Democrats demurred on Sunday on whether Donald Trump has committed impeachable offenses after he was implicated last week in a potential crime, but promised vigorous investigations if the party takes control of the U.S. House in the midterm elections.

¡°The role of Congress is not to protect the president,¡± Rep. Jerrold Nadler of New York said on NBC¡¯s ¡°Meet the Press.¡± ¡°It¡¯s to ... hold the president and any president accountable to the American people.¡± Nadler is the top Democrat on the House Judiciary Committee, which would hold any impeachment hearings.

His comments came after a week of increasing chatter about how or when Congress will judge whether the president¡¯s conduct meets the threshold for impeachment. In his Aug. 21 guilty plea to campaign finance violations, Michael Cohen, Trump¡¯s former lawyer and ¡°fixer,¡± implicated the president in off-the-books hush money paid to a porn star. Paul Manafort, Trump¡¯s former campaign manager, was found guilty the same day of bank and tax-fraud charges.