Dick Durbin says three Democrats are still undecided on impeachment, and he doesn't know how they'll vote

A top Senate Democrat says that he simply doesn't know how three yet-undecided Democratic members plan to vote in the impeachment trial of President Donald Trump. Neither he nor the chamber's top Democrat can guarantee that President Trump won't enjoy a bipartisan acquittal at the end of the process.

Senate Minority Whip Dick Durbin (D-Ill.) told CNN's Manu Raju, "I don't know the answer," Tuesday when asked whether or not Democrats would be united on impeachment. He also said that Senate Minority Leader Chuck Schumer (D-N.Y.) had been in contact with three Democrats who haven't yet committed to how they'll vote, but that he couldn't put pressure on them on an issue "of this magnitude."

While Raju didn't list them by name, the three Senate Democrats who still appear to be undecided are Doug Jones (Ala.), Joe Manchin (W.Va.) and Kyrsten Sinema (Ariz.). Of those three, Jones is the only one currently facing re-election in November, and since he's running statewide as a Democrat in Alabama, he's unlikely to keep his current seat in the first place. Sinema and Manchin both ran as moderates in states with large swaths of Republican voters. Manchin won his re-election bid by fewer than 3 percentage points in 2018 while Sinema won her race by a similarly narrow margin.

If they still haven't made up their minds at this point, they have until Wednesday afternoon to do so. That's when the Senate is expected to cast its final vote on the issue. Seeing as an impeachment conviction requires a two-thirds Senate majority per the Constitution, it's all but certain at this point that the president will be acquitted of the House's charges. But the specifics of how the final votes might break down remains unclear.

If only Democrats break ranks on votes on the impeachment vote, it would give congressional Republicans the opportunity to reprise one of their talking points from the House's final vote in December — i.e., that the only thing bipartisan about this process has been the opposition to it. But there's a very real possibility that there might be some Republican crossover in the upper chamber.

Both Republican Sens. Mitt Romney (Utah) and Susan Collins (Maine) broke party lines and joined with Democrats during last week's vote on whether or not to consider further trial witnesses and neither one of them has announced which way they intend to vote on conviction or acquittal.