He is basically the epitome of a Bush Republican.
Yes -- a big-government right-winger, a socialist for the rich, a reckless drainer of the Treasury, just like Dubya. Rick Santorum is a right-wing authoritarian populist, a semi-fascist demagogue who shows contempt for homosexuals, feminists, and eggheads -- and who knows what else. I can easily imagine him, like Dubya, initiating a war for profit or control of oil, on some shabby pretext. I don't trust him with my civil liberties even if I am straight and nominally Christian.
War is the ultimate creator of big deficits -- and if anyone wants to impose sanity with the budget one of the first things to do is to limit wars to declared wars, wars and military actions approved by international organizations (UN, NATO, OAS), short-term maneuvers in response to immediate threats, or wars in response to multilateral treaties. Such would not have stopped American involvement in WWI, WWII, the Korean War, the Cuban Missile Crisis, the invasions of Grenada or Panama, aid to Kosovo, or Desert Storm. Dubya could have probably gotten a declared war for Afghanistan. National sovereignty of the US and its allies is worthy of defense, but aggression and bungled wars aren't.