(Not exactly sure about the answer) The Congress would have to bring treason against the president, because of the fact that the president went against the countries rules by taking a bribe that could've been related to helping another country. The responsibilities of the Reps. and the senate would have to be, to give the president the punishment of impeachment.
The 25th Amendment outlines the rules of succession to the U.S.
Presidency and Vice Presidency in the event of either or both of them
dying, withdrawing or being removed from office.
