Could impeachment support from House Democrats' No. 4 be a tipping point?

New Mexico Rep. Ben Ray Luján

On the heels of new support for an impeachment inquiry by the House Democrats' No. 4 on the leadership team, a guessing game has broken out on Capitol Hill about who might be next and what that could mean for Speaker Nancy Pelosi.

Some speculate that the change of heart by New Mexico Rep. Ben Ray Luján, who last year led the Democratic Congressional Campaign Committee to historic gains in the midterm elections, could hold sway among a swath of freshmen members who view him as a mentor. Those new members, in turn, are the very lawmakers Pelosi is presumably trying to shield from what she believes could be a politically fraught endeavor.

In addition, Politico is reporting that some on the Hill are keeping an eye on civil rights icon and Georgia Rep. John Lewis for a potential shift toward launching a formal inquiry. Lewis, of course, holds a certain moral center of gravity within the caucus that could be a game-changer. 

The number of House Democrats favoring impeachment currently stands at 125, according the Washington Post, well past the halfway mark for the caucus.