Sen. Bernie Sanders (I-Vt.) won the popularity contest among Democrats at the Iowa State Fair, edging out Hillary Clinton 49 percent to 45 percent in an informal poll on favorability, The Hill reports. The numbers, which were posted on the Iowa Secretary of State website, show that Sanders and Clinton had just over 1,000 votes combined. Republicans swept the fair, garnering 3,400 votes in their collective favor. Donald Trump maintained his usual wild lead, followed by Ben Carson and Ted Cruz.

While Sanders spoke at the Des Moines Register Soapbox and Clinton did not, the poll is still something of a big shift in numbers, coming on the heels of a recent poll in the early primary state of New Hampshire, which had Sanders leading 44 percent to Clinton's 37 percent. Still, these interesting stats might not mean anything yet. Let FiveThirtyEight data whiz Nate Silver explain:

In Sanders, Clinton has drawn an opponent who is relatively well suited to New Hampshire and Iowa. The reason is simple: Sanders' support comes mostly from white liberals, and the Democratic electorates in New Hampshire and Iowa have lots of white liberals. Furthermore, Iowa and New Hampshire are small states, which makes it easier for candidates who don't have Clinton’s financial resources to compete there. But we've seen this movie before. Based on current polling averages, Sanders would almost exactly replicate [Bill] Bradley's performance in 2000, losing Iowa by double digits, giving Clinton a close call in New Hampshire, then losing badly once the calendar turned to more populous and diverse states. [Five Thirty Eight]

Jeva Lange

Former Vice President Joe Biden could be down to two contenders in his search for a running mate.

A new report from Axios details how Biden confidants believe he has narrowed his list down to Sen. Kamala Harris (D-Calif.) and former National Security Adviser Susan Rice. While the report cautions that things could change, it notes that these confidants "would be surprised if he picks anyone else."

As far as Harris goes, Axios writes that Biden's brain trust has "deep and trusting relationships" with those who are pushing for the California senator while touting her skills as a prosecutor. But on the other hand, according to the report, Rice is "getting a big bounce" from former President Barack Obama's alumni, who say that picking her would "guarantee the enthusiastic presence" of Obama and former first lady Michelle Obama on the campaign trail.

Other possible contenders include Rep. Karen Bass (D-Calif.), who the report says is in third place behind Harris and Rice, as well as Sen. Elizabeth Warren (D-Mass.) and Sen. Tammy Duckworth (D-Ill.). The Washington Post previously reported that Biden was expected to interview five or six finalists but that there was a sense that he still doesn't have "a clear favorite."

Though Biden had previously said he intended to make his running mate pick in the first week of August, the announcement is no longer expected to come until next week, prior to the Democratic National Convention's start on Aug. 17. Read more at Axios. Brendan Morrow

In a stunning victory, progressive activist Cori Bush defeated Rep. William Lacy Clay in Missouri's 1st Congressional District Democratic primary on Tuesday.

Clay has represented the district for the last 20 years, and before that, his father, William Lacy Clay Sr., held the seat for three decades. Bush ran against the incumbent in 2018, but lost by a 20-point margin. On Tuesday, with 100 percent of precincts reporting, Bush has 48.6 percent of the vote, compared to Clay with 45.5 percent.

Bush was endorsed by Sen. Bernie Sanders (I-Vt.), and is calling for universal health care, raising the minimum wage, and police reform. In a victory speech, Bush said Missouri's 1st Congressional District "has decided that an incremental approach isn't going to work any longer. We decided that we the people have the answers, and we will lead from the front lines." Catherine Garcia

Voters in Missouri on Tuesday approved a ballot measure expanding Medicaid to roughly 230,000 low-income residents.

With 99 percent of precincts reporting, 53 percent voted "yes" on the measure, while 47 percent voted "no." Missouri is the sixth red state to expand Medicaid, and the second to do so amid the coronavirus pandemic, after Oklahoma. The state is now reporting on average more than 1,200 daily new coronavirus cases, nearly three times more than a month ago, Politico reports.

Missouri has until July 1, 2021, to expand Medicaid under the Affordable Care Act. The measure amends the state's constitution, so lawmakers cannot add requirements to the program. Gov. Mike Parson (R) opposed the expansion, saying it was too expensive and the state doesn't have enough money to pay for it. The federal government gives states up to 90 percent of funding necessary for Medicaid expansion, an improvement over the 65 percent provided to Missouri now under its current program.

"Quite frankly, Missourians are sick and tired of not getting their fair share," Jack Cardetti, a spokesman for the ballot initiative's organizers, told Politico last week "They pay their taxes, they've seen now 37 other states use that money to expand access to health care. Meanwhile, our economy's clearly ailing here." Catherine Garcia

To raise money for cancer research, Andrew Walker and Jacob Adkins traded in their ice skates for rollerblades and hit the road.

Walker and Adkins are hockey players at the University of Massachusetts Boston. They wanted to do something during the pandemic to help others, and came up with a way to raise money and awareness for the American Cancer Society: the roommates would rollerblade from Boston to Mason, Michigan, a nearly 900-mile journey.

Cancer has affected both of them personally, with Adkins' mother in remission after being diagnosed with Hodgkin's lymphoma and Walker's grandfather dying of the disease. Adkins and Walker — who dubbed themselves the Men in Blades — completed their trek in 10 days, arriving in Mason late last month. They raised $28,100, a feat they are especially proud of since donations to so many charities are down because of the pandemic.

"This experience has humbled both of us and has made us just that much more grateful for the people around us and that much more loving," Adkins told WHDH. Catherine Garcia

Rep. Roger Marshall defeated former Kansas Secretary of State Kris Kobach in Tuesday's Kansas Republican Senate primary.

With 70 percent of precincts reporting, Marshall has 39 percent of the vote compared to Kobach with 26.4 percent. Bob Hamilton is in third place with 19 percent, followed by David Lindstrom with 6.9 percent.

Republicans had been worried about the very conservative Kobach winning the primary but not being able to clinch the general election; he lost the state's governor's race in 2018 to Democrat Laura Kelly. "You have sustained real-world trials and evidence and data that say that Kris Kobach is an extremely poor general election candidate who absolutely could be the first Republican to lose a Senate race in Kansas in over 80 years," GOP political operative David Kensinger told KPR.

State Sen. Barbara Bollier, a former Republican and retired anesthesiologist, won the Democratic primary, and will face off against Marshall in November. They are vying to win the seat being vacated by Sen. Pat Roberts (R), who is retiring. Catherine Garcia

The Aurora Police Department in Colorado is apologizing after a video was posted online showing officers with their guns drawn as five members of a Black family, including a 6-year-old girl, lie face down in a parking lot.

The department says the officers mistakenly thought the family was in a stolen car. The incident took place on Sunday, with Brittany Gilliam telling CBS Denver she was sitting in the car with her 6-year-old daughter, 12-year-old sister, 14-year-old niece, and 17-year-old niece when a police officer approached. "He proceeded to handcuff me and I saw him handcuff the kids, so I started getting angry, why are you handcuffing kids," she said. Video shows Gilliam, her sister, and her 17-year-old niece in handcuffs, with the entire family face down on the asphalt and one of the children screaming, "I want my mother!"

The police department said Gilliam's car had the same license plate number as a suspected stolen motorcycle they were looking for — except Gilliam's plate wasn't from the right state. This was considered a "high-risk stop," Interim Chief of Police Vanessa Wilson said in a statement, and protocol calls for officers "drawing their weapons and ordering all occupants to exit the car and lie prone on the ground."

Wilson said the department will now look into enacting new practices and training for high-risk stops, and while Gilliam, who plans on filing a federal lawsuit against the department for excessive force, wants to see "better protocol," she is mostly worried about her daughter, sister, and nieces. "Those kids are not okay," she said. "They're never going to be okay. That was a traumatic experience. Would your kids be okay after that? Having a gun pulled on them and laid on the ground. Especially a 6-year-old."

The Aurora Police Department is already under scrutiny following last year's officer-involved death of Elijah McClain, a 23-year-old unarmed Black man who was detained as he walked home from the store. He died after being placed in a chokehold and injected with ketamine. Catherine Garcia