First, Republicans must evaluate what went wrong in Pennsylvania. This was an easily winnable district. Our candidate was not that much weaker than the Democrat (remember, the first refuge of political consultants is to blame candidates).
The biggest surprise to me was that the tax cut message was not more effective. This was doubly surprising, because the Democrat was clearly for repealing the tax cuts, and it did not seem to cost him votes. Obviously, the first big question to ask is what would have won the election decisively?
Second, Republicans must understand that if a wave is building, money loses its power to solve problems. The Republicans outspent the Democrats in Pennsylvania by a huge margin.