Kevin McCarthy is facing up to 3 years in prison if he refuses to testify about Trump: ex-prosecutor.

MSNBC's Chris Hayes interviewed former federal prosecutor Glenn Kirschner after the select committee subpoenaed McCarthy along with Reps. Scott Perry (R-PA), Jim Jordan (R-OH), Andy Biggs (R-AZ), and Mo Brooks (R-AL).

Kirschner noted, "subpoenas are supposed to be taken seriously, they're not party invitations."