President Trump and other Republicans allies sound confident about his impeachment trial, but some key Republican senators plan to push for witnesses, which could result in a new chance for Democrats to sway public opinion.

The big picture: “There’s a growing sense among senators … that there will be some witnesses,” the New York Times reports.

What she’s saying: Sen. Susan Collins (R-Maine), whose willingness to dissent gives her a big voice among Republican senators, told reporters in Maine on Friday that she is working with a “fairly small group” of fellow GOP senators toward a goal of ensuring witnesses can be called, the Bangor Daily News reported.