Rep. Ilhan Omar said it's a matter of when, not if, President Donald Trump will be impeached and she's not worried about House Speaker Nancy Pelosi and others not moving ahead right now.

"It is OK for some people to have hesitations, for other people to catch up to where some of us have been for a very long time," the first-term Democrat from Minnesota said Sunday on the CBS show "Face the Nation," billed as her first one-on-one network interview.

Omar, with New York's Alexandria Ocasio-Cortez, Michigan's Rashida Tlaib and Ayanna Pressley of Massachusetts, refer to themselves as "the Squad" and drew repeated attacks from Trump over the summer.