I'm leaning republican. Merkel opposes gay marriage, opposed a national minimum wage until 2011 and is a supporter of austerity. But since government spending is a lot higher in Europe supporting spending cuts in Europe is a bit different from supporting spending cuts in the US, so it's really difficult to compare European politicians/parties with American parties.
Well, I think she privately favors gay marriage. She couldn't answer why she's against it during a campaign rally in 2013. She's also a liberal on immigration, let alone being pro-choice and support for green energy. And, she's in favor of all the government programs like health care. If Merkel were president, I'm sure she would veto any bill to repeal Obamacare.