Which power is exclusive to the Senate?

A. impeaching officials

B. approving international treaties

C. introducing money bills

D. passing bills out of committee

To formally start proceedings, a representative has to introduce a resolution to the House either calling for impeachment or authorizing an inquiry into one. A majority of the House (currently controlled by Republicans) then has to vote for it. Right now, even trying that would be a waste of political capital, since Trump is yet to do anything that even moderate-leaning Republicans would likely agree to impeach him for.