With one op-ed piece in the WSJ, Sarah Palin has made a lasting impact on the dynamic of the upcoming Republican presidential race — even if she doesn’t run. (Though I think she will.) By strongly endorsing Rep. Paul Ryan’s outstanding Roadmap for America’s Future, Palin has set a floor for how radical and sweeping an agenda the 2012 candidates can offer. Anyone offering less will look timid and inconsequential and most un-Tea Party-esque. One of the big knocks against Ryan’s plan is that few of his colleagues are supporting it. Now the most high-profile Republican in America has given it her seal of approval. The Ryan Roadmap is quickly becoming the de facto GOP economic platform.  And if Palin does decide to run, she immediately starts out with  a specific and coherent agenda.  Candidates beware: Bullet points and platitudes aren’t going to cut it.