The Pope is anti-marxism.
The Church is critical of the Left's position on abortion.
The Church is critical of the Right's position on immigration reform.
I find it rather amusing that the left wing TIME magazine made the Pope Man of the Year. He is solidly anti-abortion and the day he will allow a gay marriage in the Catholic Church is never. Those are not left wing goals.
I think Rush and the gang are wrong to call him a Marxist. What I got from his message is he is against unregulated capitalism, and most right wingers I know agree with that position. He also criticized the centralization of power in the Catholic Church, which certainly means he should see the same problem with the centralization of power in the government.
I am not a Catholic, but that is my take on the Pope.