But many exiting lawmakers also bring years of experience to the Obama administration.
Barack Obama announced two more cabinet picks Wednesday – former Iowa Governor Tom Vilsack for Agriculture secretary and Colorado Senator Ken Salazar for Interior secretary – drawing both praise and criticism from environmental groups.
Party leaders are likely to find congressional freshmen more independent than usual.
Demographic shifts may help turn the state blue.
He narrowed Clinton's lead to 13, picking up four after Tuesday's primaries.