Though the explanations for their refusals have been varied, several candidates are in tight races that will determine future control of the Senate.
Doug Jones will reprise his role as Billy Butcherson in the reunion, alongside an all-star cast joining the benefit.
At least eight GOP incumbents are in danger of losing their seats, while just one Democrat looks likely to be ousted.
Democrats need to gain at least four seats to take control of the upper chamber of Congress from the GOP.
Both moderate Democrats have not only stated they oppose rushing to fill a vacancy left by Justice Ruth Bader Ginsburg—they have blasted Mitch McConnell for pushing to confirm a nominee before the election.
Democrats would need to win at least four Republican seats while maintaining all their current seats to take control of the upper chamber of Congress.
Tuberville, a former football coach, defeated Jeff Sessions in a contested runoff to clinch the Republican nomination.
Sessions called his opponent Tommy Tuberville "cowardly to debate," in response to Trump's tweet.
Sessions is pitching himself to Alabama voters as an ardent Trump loyalist despite being "forced...out" of the office by the president in November 2018, as The New York Times described the tense White House split.
A trio of Democratic senators—Joe Manchin of West Virginia, Doug Jones of Alabama and Krysten Sinema of Arizona—are considered toss-ups when it comes to whether they'll vote to convict the president.
Republican Senator Ron Johnson said it's "bizarre" House Speaker Nancy Pelosi has not sent the articles of impeachment over to the Senate, but Democratic Senator Doug Jones said he's glad she's demanding to know what the playing field looks like for a trial.
"Who in the world are his advisors? At what point does he think another run will have a different response," Haley said.
"You are literally the only candidate who could lose a GOP seat in pro-Trump, pro-USA ALABAMA," Trump Jr. tweeted at Moore last week.
Rep. John Rogers reacts to criticism over his original abortion comments by doubling down.
"What I am disappointed in now is he's not fulfilled my expectations about being an independent attorney general," Senator Doug Jones said.
The Alabama senator sees unsettling echoes of America's racist past in the Trump era. His new book is a wake-up call with a powerful message: Never forget.
"This law sends a powerful message to those impacted by these horrific crimes and to young folks in this country who want to make a difference," Democratic Senator Doug Jones of Alabama said.
"If Sessions wants to run I expect them [the White House] to pick them a candidate and bash Sessions for a year-and-a-half."
Trump reportedly is the one who had given Conway personal approval to criticize a Senate candidate.
"Photo of the decade: Doug Jones being sworn in, while his openly gay son QUIETLY DISINTEGRATES THE SOUL OF MIKE PENCE," one user Tweeted.
Moore's campaign has spent the past week raising money for an "Election Integrity Fund" and targeting Muslims and gays on Facebook, while Moore still refuses to concede despite having no chance of a recount.
Senator-elect Doug Jones and Senator Joe Manchin both say Americans should "move on" from the sexual misconduct allegations against the president.
The Alabama Republican says he's not giving up despite his defeat.
Democrats are uniting against President Trump, but will it be enough to win back Congress in 2018?
After Doug Jones's historic upset in Alabama, Americans are thanking black women. What they should be doing, political activists say, is electing them to office.
White people almost single-handedly elected a homophobic, anti-Muslim accused child molester to the Alabama Senate.
The Republican governor signed a law in May that restored voting rights to some felons.