President Donald Trump faces multiple investigations into charges that his 2016 campaign had ties to Russia, including the appointment this week by the Justice Department of a special counsel. As a result, some Democratic lawmakers — and a couple of Republicans — have brought up what people in Washington sometimes refer to as the "i word."

The mentions of that word — impeachment — run the gamut from vehemence to caution. Some lawmakers, like California Democrat Maxine Waters, have vigorously demanded the president's impeachment, while others have been more restrained — raising it only as the possible outcome of a process that still has a very long way to go. And Rep. Eliot Engel of New York, among others, has encouraged Democrats to stop talking about impeachment altogether, saying the facts aren't in.

Here's a list of those who have let the word "impeachment" cross their lips.

House Members

Senators