Collocations for Congressman, Congresswoman - noun

Democratic, Republican
conservative, liberal
local
leading
incumbent
four-term, eight-term, etc.
freshman
former

elect (sb), re-elect (sb)
He was elected congressman in 1997.

lobby
contact, write
Many people have written their congressmen with complaints.

call for sth
a leading congressman who's calling for a crackdown on illegal aliens