Sen. Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.) called for donations to the reelection campaign of Sen. Doug Jones (D-Ala.) on Thursday after Jones's former challenger, Roy Moore Roy Stewart MooreRoy Moore sues Alabama over COVID-19 restrictions Vulnerable Senate Democrat urges unity: 'Not about what side of the aisle we're on' Sessions hits back at Trump days ahead of Alabama Senate runoff MORE, announced a new Senate bid.

Moore, the former state chief justice who faced allegations of sexual misconduct of minors during his Senate run in 2017, said Thursday that he would run again in 2020 against Jones, who is running for a full term after winning a special election to replace former Sen. Jeff Sessions Jefferson (Jeff) Beauregard SessionsRoy Moore sues Alabama over COVID-19 restrictions GOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs MORE (R).

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"Here’s what I know: The next Democratic president needs a Democratic Senate to get her agenda passed. And Democrats can’t flip the Senate without reelecting Doug," Klobuchar wrote in a fundraising email Thursday evening.

"Since he arrived in the Senate, Doug and I have worked together to defend health care, combat voter suppression, and provide help for America’s farmers," she continued. "I was there when he gave his first speech on the Senate floor. He’s been a great partner as we work to get things done for the American people."

The email goes on to call Moore "unfit" for public office, and requests readers to send donations that would be split between Jones's reelection campaign and Klobuchar's own 2020 candidacy for president.

Moore's candidacy is expected to be uniformly opposed by Democrats and Republicans on Capitol Hill, with republicans including Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE and Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellTrump 'no longer angry' at Romney because of Supreme Court stance On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline The Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power MORE (R-Ky.) releasing statements in opposition to the former chief justice's Senate bid.

"We'll be opposing Roy Moore vigorously," McConnell told reporters Thursday afternoon.