Rep. Jamie Raskin (D-Md.) is seen by colleagues as a decisive favorite to topple House Judiciary Committee ranking member Jerry Nadler (D-N.Y.). Why it matters: A win for Raskin would be a major break with House Democrats' seniority system as multiple lawmakers try to oust older committee leaders.

Rep. Jamie Raskin (D-Md.) on Monday formally launched his campaign to unseat House Judiciary Committee ranking member Jerry Nadler (D-N.Y.). Why it matters: House Democrats are engaged in an intense battle over whether to oust their oldest committee leaders in favor of relatively younger alternatives in an effort to better combat the Trump administration.

Rep. Jamie Raskin, who served as the lead Democratic prosecutor in Donald Trump's second impeachment trial, will challenge Rep. Jerry Nadler for House Judiciary chairman.