He is the type that likes to complain about everything and do nothing. He would rather circle the wagons and fire inward than fire out at the Democrats.
This is precisely why it is much easier to look effective when you are on the outside looking in (as the Republicans in Congress were before 1994). When you function as an opposition party, people tend to overlook the fact that in the midst of all your accurate criticism of the party in power, you rarely offer meaningful, workable alternatives.