After slamming President Trump's "revolving door" of "amateurs, grifters," and "felons" last year, former New Jersey Gov. Chris Christie is reportedly back visiting the White House.

Christie, Politico reports, spent the day in the West Wing on Friday as the president's team gears up for the Senate's upcoming impeachment trial.

The former New Jersey governor competed against Trump for the 2016 Republican nomination and was later ousted from Trump's transition team. Last year, he released a book in which he wrote that Trump surrounds himself with "a revolving door of deeply flawed individuals — amateurs, grifters, weaklings, convicted and unconvicted felons."

Christie also revealed that he turned down offers to join the administration no fewer than seven times, and he suggested in an interview that some in Trump's inner circle were "lying" about Russia because "bad people and stupid people lie for no reason."

Despite his harsh words, the former governor in December launched a pro-Trump advocacy group, saying there has been "a lack of attention on the positive things the administration has done for the country." As Politico reports, the Trump administration has been preparing a "made-for-TV" defense of Trump ahead of the trial, and Trump is closely monitoring the image his defense portrays as he seeks "to get his side of the story told."

The specific reason for Christie's West Wing visit isn't clear, but when he launched his pro-Trump group, he said he's "always tried to get the other part of the story out there to the people." Brendan Morrow

More than 230 scientists from 32 countries are asking the World Health Organization to address growing evidence that the coronavirus can spread indoors via aerosols that float in the air, The New York Times reports.

The WHO has maintained that the coronavirus is primarily spread by infected people who sneeze and cough, with their large respiratory droplets falling to the ground quickly. In its most recent guidance, the WHO said airborne transmission of the virus is only possible after medical procedures that produce aerosols. The scientists disagree, writing in a soon-to-be-published open letter that smaller exhaled particles can infect people, and the WHO's recommendations should be revised.

Multiple scientists told the Times that while they appreciate the WHO's work and attempts to educate the public, they are slow and risk-averse to updating recommendations. Dr. Benedetta Allegranzi, the WHO's technical lead on infection control, told the Times the organization stated "several times that we consider airborne transmission as possible but certainly not supported by solid or even clear evidence. There is a strong debate on this." Read more at The New York Times. Catherine Garcia

President Trump will hold an outdoor rally in New Hampshire next Saturday, with his campaign saying on Sunday it will pass out face masks and hand sanitizer to attendees.

The rally will take place at Portsmouth International Airport. In June, Trump held his first campaign event in months at Tulsa's BOK Center. About 6,000 people showed up, a smaller-than-expected crowd. Hogan Gidley, Trump 2020's national press secretary, said in a statement the campaign is looking forward to "so many freedom-loving patriots" coming to the New Hampshire rally and "celebrating America."

The number of coronavirus cases continues to climb across the country, and Ray Buckley, chair of the New Hampshire Democratic Party, told Reuters the rally will "only further highlight the chaos" Trump has caused in his "woefully inadequate" handling of the pandemic. Catherine Garcia

Dominion Energy and Duke Energy, the developers behind the 600-mile Atlantic Coast Pipeline, announced on Sunday they are canceling the $8 billion project.

The natural gas pipeline was set to go from West Virginia through Virginia to North Carolina. The project was first announced in 2014, with the developers saying they wanted the pipeline operational by 2018, but it was delayed due to environmental groups filing several legal challenges over permits.

Supporters said the pipeline would create manufacturing and construction jobs, while environmentalists and land owners argued it would destroy Appalachian forests. In June, the Supreme Court ruled that the U.S. Forest Service did have the authority to give the developers a key permit, but in a statement on Sunday, Dominion Energy and Duke Energy said there is still an "unacceptable layer of uncertainty and anticipated delays," making the project "too uncertain to justify investing more shareholder capital." Catherine Garcia

President Trump has a penchant for tagging his political opponents with simple, but biting nicknames. The one he chose for his presumptive Democratic presidential challenger, former Vice President Joe Biden, doesn't seem to have landed like those in the past, however, Axios reports.

It's well-known Trump refers to Biden as "sleepy Joe," but so far, at least judging by Google search trends, voters apparently don't associate the moniker with Biden all that much. Trump dubbed his 2016 opponent, Hillary Clinton, as "crooked" Hillary, which prompted far more searches than "sleepy Joe." As analysts noted, there are likely several reasons for this. Regardless, it could be a small, but telling data point that shows Trump's patented insults may not have the same affect in 2020 now that the novelty has worn off.

Of course, it could just be that "sleepy" isn't particularly evocative, which is perhaps why the Trump campaign has recently starting trying out "corrupt Joe Biden." Read more at Axios. Tim O'Donnell

May and June unexpectedly produced strong jobs reports. The unemployment rate, while alarming, is much lower than it was in April after the first surge in coronavirus cases and appeared to skate around economists' most pessimistic projections. But Mark Zandi, the chief economist at Moody's Analytics, told CBS News' Margaret Brennan on Sunday that things are likely to take a turn for the worse.

Zandi said the return of millions of jobs over the last two months is at least in part the result of states reopening businesses too soon amid the pandemic. Now that infections are climbing in several states that mostly avoided the worst back in March and April, those places are "pulling back" their reopening efforts, which hasn't shown up in the data yet. "That's coming down the road," he said, predicting that June's progress is in the rearview mirror.

The most recent spike in states that play a driving role in the national economy, like Texas, California, and Florida, is "very disconcerting," Zandi said, adding that "the prospects of going back into a recession are pretty high." Tim O'Donnell

Susan Rice, who has previously served as both the United States Ambassador to the United Nations and former President Barack Obama's national security adviser, is "very much in the mix" to be former Vice President Joe Biden's running mate as he tries to unseat President Trump in the 2020 election, a source close to the Biden campaign told The Hill.

Rice doesn't get as much attention as two other candidates for the job, Sens. Kamala Harris (D-Calif.) and Elizabeth Warren (D-Mass.), but she does appear to have a leg up on the lawmakers in one area. "I know [Biden and Rice] have a good relationship — perhaps the best relationship of anyone on the list," the same source said. "They've known each other for years, they've worked alongside each other and she's been tested in a way that a lot of folks on the list just haven't been."

Biden has gone on the record saying he wants his potential vice president to be someone who is "simpatico." That is, someone who agrees with him on both "philosophy of government" and "the systemic things you want to change." Rice seems to fit the bill in that case — a former Obama administration official said she "makes perfect sense."

On Sunday Rice continued to play it cool, telling NBC's Andrea Mitchell, "let's not get ahead of ourselves" when asked about the possibility, but she did address some skepticism about her lack of experience running for office by noting that not only did she serve in government for years, she's worked on multiple campaigns. Whether she's Biden's running mate or a "door knocker," though, Rice said she'll do whatever she can to get Biden elected. Tim O'Donnell