Opening arguments begin Wednesday in the federal corruption trial of Sen. Robert Menendez (D-N.J.), accused by federal prosecutors of aiding a friend and alleged co-conspirator, Dr. Salomon Melgen, in return for hundreds of thousands of dollars in campaign contributions, free trips to the Dominican Republic and stays at Melgen's villa, and other gifts. The trial, in New Jersey, is expected to last about two months, and last week, a federal judge shot down Menendez's request to schedule the trial around Senate business. This will be the first high-profile public corruption case since the Supreme Court threw out the conviction of former Virginia Gov. Bob McDonnell (R) last year.

"I look forward to proving our innocence and being exonerated," Menendez, 63, told reporters last week. He is the first sitting U.S. senator to go on trial for corruption in almost 40 years, and if he is convicted, that would set up a battle over whether to expel him from the Senate while Republican Gov. Chris Christie (N.J.) can name a replacement before leaving office in January. You can learn more about the charges, and the hurdles federal prosecutors have to overcome, in the CNN report below. Peter Weber

At least four people were wounded when a gunman opened fire at Mercy Hospital in Chicago on Monday afternoon.

The victims, including a police officer and a hospital employee, are in critical condition. The gunman is dead, a police spokesman said, and it's not known at this time if he took his own life or was shot by officers.

Witness James Gray told ABC7 Chicago the gunman appeared to be "turning and shooting people at random." The hospital is on the city's South Side, and authorities are asking people to stay away from the area. Catherine Garcia

The Trump administration's decision to add a question of citizenship to the 2020 census may have had some political motivations after all.

Census surveys are confidential, but several lawsuits still alleged including a question about citizenship would discourage undocumented immigrants from taking the census. Now, documents filed in a California suit Friday show the census' inherent confidentiality may have been in danger, The Washington Post reports.

Commerce Secretary Wilbur Ross announced in March that the 2020 census would explicitly ask if people were U.S. citizens. Lawsuits across the country quickly challenged the constitutionality of the proposal, and critics said undocumented peoples' fear of taking the survey would lead to undercounts. Questions also arose over the motivation behind adding the question, with some worrying President Trump's hostility toward non-citizens would leave the census results vulnerable to Immigration and Customs Enforcement.

As activists and attorneys prodded Trump officials over whether the question results would remain within the Commerce Department, as mandated under the Census Act, at least one official was told to stay silent, per the Post. Friday's court filings show a June 12 email to acting Assistant Attorney General John Gore, in which a Department of Justice attorney told him not to "say too much" about the confidentiality issue because it might "come up later for renewed debate."

The first of several trials challenging the question is currently underway in New York. A hearing over what evidence can be used in these trials, and whether Trump officials' motivations in enacting the question can be considered, is slated for the Supreme Court in February. Kathryn Krawczyk

Six people were stuck in an elevator in Chicago's fourth-tallest building on Friday. But firefighters weren't exactly sure where they'd ended up, seeing as a cable had snapped and sent the car plummeting from the 95th floor. And there was no easy way to find out, the Chicago Tribune details.

A pair of Northwestern University law students, a married couple, and two New Zealand tourists stepped into an elevator in the former John Hancock Center just after midnight Friday. But their ride down soon turned bumpy — "like a flight into Chicago," one student told the Tribune. A clacking noise rattled as the passengers fell, and dust poured into the car. Jaime Montemayor, visiting from Mexico with his wife, told CBS Chicago he "believed we were going to die."

The car didn't hit the ground thanks to a few stable cables, but it was hard to tell exactly where it ended up because the blind-shaft elevator had no windows. One student told the Tribune they felt like they'd only fallen "a few floors." Firefighters eventually found the car had plunged 84.

Since the firefighters couldn't safely "come down like Batman" on ropes from the top of the shaft, as one firefighter described it, they had to hack a hole in the wall. Three hours later, the six passengers emerged into an attached parking garage without injury. Read more about the extensive operation at the Chicago Tribune. Kathryn Krawczyk

The founder of the Women's March is joining growing calls for its current leaders to step down.

After Teresa Shook's plan for a march against President Trump took off, she handed the reins over to a group of activists. But in a Monday statement, Shook said those new leaders had "steered the movement away from its true course" because they "have allowed anti-Semitism, anti-LBGTQIA sentiment and hateful, racist rhetoric to become a part of the platform."

After Shook launched the idea for a Women's March, activists Bob Bland, Tamika Mallory, Carmen Perez, and Linda Sarsour stepped up to organize it. Millions of people around the world marched the day after President Trump's inauguration, inspiring follow-up marches of the same nature.

Months later, criticism began to arise over Mallory, Perez, and Sarsour's ties to Louis Farrakhan, the Nation of Islam leader who has repeatedly made anti-Semitic comments. They've since come short of condemning Farrakhan, prompting conservative calls to boycott future Women's March events. Sarsour has received most of the derision for the Farrakhan ties, as well as other controversial comments.

All of these moves are "in opposition" to the Women's March's principles, Shook said in her Monday statement. So in an effort to bring the movement back to its roots, Shook called for "the current co-chairs to step down" and for leaders who can "restore" the march's "original intent" to step forward. Kathryn Krawczyk

The FBI now classifies the Proud Boys as an "extremist group with ties to white nationalism," The Guardian reports.

The classification was reportedly included in a memo written as part of an internal investigation into a sheriff's deputy in Clark County, Washington, who was fired for wearing a "Proud Boys Girls" sweatshirt. An official at the Clark County sheriff’s department confirmed the memo is authentic, saying that the county was briefed by the FBI and told that the bureau has "warned local law enforcement agencies that the Proud Boys are actively recruiting in the Pacific Northwest."

The Proud Boys was founded in 2016 by Vice co-founder Gavin McInnes, who once said on his show that he's "disappointed in Trump supporters for not punching enough." Last month, members of the Proud Boys were arrested and charged with multiple counts including gang assault and rioting after violence between Proud Boys and antifascists broke out outside a McInnes speech in New York, CBS News reports. There was also violence between Proud Boys and Antifa members at a Portland rally that same weekend. This memo was written in August, before additional violence occurred in New York and Portland, but it says that Proud Boys have "contributed to the recent escalation of violence at political rallies" and in cities like Charlottesville.

The FBI describing the Proud Boys as extremists had not been reported before, but the Southern Poverty Law Center had previously classified them as a hate group, Al Jazeera reports. Brendan Morrow

Taylor Swift is moving on.

The singer revealed on Monday that she will be switching record labels, from Big Machine Label Group to Universal Music Group and Republic Records. She will also now own her master recordings for any future music. Part of the deal included helping other artists receive money for their Spotify streams. "I see this as a sign that we are headed towards positive change for creators – a goal I'm never going to stop trying to help achieve," Swift wrote in an Instagram post.

The condition on UMG's Spotify shares: "any sale of Spotify shares result in a distribution of money to their artists, non-recoupable," means that benefits from Spotify sales shares do not go against an artist's debt, said The Guardian. Music lawyer Gregory Pryor told The Guardian that although the agreement is not radical, Swift using it as an opportunity to help other artists is.

Swift has been an advocate for streaming services paying artists before. In 2015, Swift wrote a letter refusing to put her album 1989 on Apple Music. She asked the company to pay artists during their three month free trial period, which Apple Music eventually agreed to do.

Her last album, reputation, was her last under contract with BMLG, her label since 2006. BMLG was heavily negotiating to keep Swift signed on, Billboard wrote in August. Swift's sales and streaming account for 34.6 percent of BMLG's revenue, and her masters reportedly could be worth hundreds of millions of dollars over their lifetime. BLMG founder Scott Borchetta discovered Swift in a cafe in Nashville before he had even started the label. In her announcement, Swift thanked Borchetta "for believing in me as a 14-year-old and for guiding me through over a decade of work." Emma Henderson