Senator Doug Jones (D-Ala.), who won a stunning special election victory in 2017 and faces a difficult reelection campaign next year, said Sunday that he remains undecided on whether President Trump should be removed from office.

Jones — a former prosecutor and moderate Democrat representing a deeply conservative state that overwhelming backed Trump’s presidential campaign in 2016 — said he is keeping his mind open ahead of the pending Senate trial, following the House’s vote to impeach the president last week.

“Quite frankly, I didn’t sit in front of the TV set the entire time the last two or three months. I’ve been trying to read this. I’m trying to see if the dots get connected,” Jones said in an interview on ABC’s “This Week.” “If that is the case, then I think it’s a serious matter. I think it’s an impeachable matter.”

But, Jones added, “If those dots aren’t connected and there are other explanations that I think are consistent with innocence, I will go that way, too. I have got to make sure that — what I really want to see, though, is to fill in the gaps. . . . I would like to see a full and complete picture.”

At the start of the impeachment hearing, the senators will take an oath to provide “impartial justice.” As a result, most senate Democrats have declined to say whether they’ll vote to remove Trump from office, and have chastised their Senate Republican colleagues for publicly promising to work to acquit the president. But Jones’s comments on “This Week” were unusually equivocal, signaling the tricky political tightrope Jones must walk.