The cringeworthy moment came on Sunday during an appearance on MSNBC’s “Up with Chris Hayes.” While talking defense spending cuts, guest host Steve Kornacki mentioned that Ellison had “teamed up with a very conservative Republican” on a piece of bipartisan legislation.

Ellison replied, “No doubt about it, me and Mick — oh my [goodness]… Um, I can’t think of Mick’s last name.”

The congressman knew he was on the right track with an “m” name, so took another stab at it, saying with a laugh, “Uh, Mick Mikulski I think it is. He and I teamed up on a letter on which we proposed some serious defense cuts and we’re looking forward to seeing that happen.”

The only problem? Mikulski of course is the surname of Maryland Democratic Sen. Barbara MikulskiBarbara MikulskiGore wishes Mikulski a happy birthday at 'Inconvenient Sequel' premiere Bipartisan friendship is a civil solution to political dysfunction Dems press for paycheck fairness bill on Equal Pay Day MORE. The House member Ellison meant to say was actually Rep. Mick Mulvaney (R-S.C.).

Ellison made light of his boo-boo, telling ITK, “We all slip up sometimes. I think I would have forgotten the name of my own kids in that moment.”

The congressman added, “It was a pleasure to work with Mick Mulvaney on reducing wasteful Pentagon spending, and I hope to continue working with him in the future.”