Partisans seem unlikely to change their minds on impeachment. Independents might.

… Are the open hearings being held by the House changing perceptions of impeachment? Is support for removing Trump from office growing?

New polling suggests that the shifts so far have been modest. Importantly, it also suggests that most Americans are intractable on the subject and that the group most likely to be persuaded is independents — making it unlikely that many Republicans representing solid-Republican districts would join votes condemning the president. CONT.

Philip Bump, Washington Post