If so, why?
The first problem with the Catholic church and Catholics in general is they can't seem to identify who their adversaries are. Half of them are supporting and voting for the very people and party's that are undermining Catholicism in the West.
You've got the silly situation of Catholic leaders supporting leftist party's and politicians, and then wondering why Christians are losing the debate over abortion, gay marriage, etc.
A good first step would be for the Catholic church and the faithful to STOP supporting liberals, leftists, socialists, etc. It's as if they can't figure out that the left are secular socialists and will always do everything possible to undermine the Christian church.
First step would be to recognize that a solid majority of the truly faithful (those who actually practice the faith) already don't support leftists etc. Furthermore, a large minority even of the not-particularly faithful don't support leftists etc.
So ... it would seem that we need to:
1) Persuade the minority of the truly faithful who do support leftists that their political voting patterns are completely out of step with the faith they profess and practice. Catholic social teaching is strongly anti-socialist (blither from leftist bishops to the contrary notwithstanding). Specifically, in American politics, being Catholic may not require voting for Republicans but it certainly seems to me to forbid voting for democRats.
2) Challenge those who profess to be Catholic, but don't practice the faith, to put up or shut up. If you're going to claim to be Catholic, act like it.