Sen. Claire McCaskillClaire McCaskillVA opposes bill aimed at helping vets in mustard gas experiments Blame game begins on Zika funding Overnight Tech: Obama heads back to Silicon Valley | FCC meeting preview | Yahoo bans terror content | Zuckerberg on sit-in live streams MORE (D-Mo.) said Thursday that she will not vote for Sen. Harry ReidHarry ReidDems leery of Planned Parenthood cuts spark Senate scuffle Overnight Finance: Senate sends Puerto Rico bill to Obama | Treasury, lawmakers to meet on tax rules | Obama hits Trump on NAFTA | Fed approves most banks' capital plans Senate passes Puerto Rico debt relief bill MORE (D-Nev.) to remain as leader.
“Yesterday I met with Harry Reid and told him I would not be supporting him for Minority Leader," McCaskill said in a statement to The Kansas City Star.
Democrats are holding leadership elections on Thursday morning after a midterm drubbing that saw Republicans capture the upper chamber.
There is no known challenger to Reid, currently the majority leader, for minority leader in the next Congress. But Democrats are still frustrated after their heavy losses in the election.
"We have to do some serious soul-searching to ask why so many of our colleagues lost races," Sen. Tim Kaine (D-Va.) told The Hill. "They were not bad public servants. They weren’t bad candidates. We have to ask why they lost."
Sen. Joe Manchin (D-W.Va.) declined to commit to Reid when asked by Bloomberg on Wednesday.
“I’m interested in hearing the discussion,” he said.
On the House side, Nancy Pelosi (D-Calif.) is expected to remain as minority leader, though Rep. Bill Pascrell (D-N.J.) has called for delaying leadership elections to allow members to "take inventory."