Some don't want to hear this but...
Democrats can put up a literal dead candidate and will win. Republicans will have to find perfect candidates to win elections. Let's face it, Walker, who is a dirty rat of a person, who held his GF at gunpoint and aborted babies, will never be elected to office. It was stupid of the GOP to allow him to even be on the ballet.
Furthermore, if suburban women don't like a candidate, Trump, Walker, etc, the candidate will lose. And the stances a candidate stands for matter to the majority of voters, the suburban women: abortion, free education, greater access to social safety nets as divorces continue crash marriages and these women marry the government, and of course gun control. If there are any possible accusations of infidelity, of spousal abuse, etc, the Democrat party will exploit this to the Republican Party's detriment. If republicans are going to win going forward, they will have to shift left of Obama to appeal to the majority of voters.