WASHINGTON (AP) — There's the 2012 presidential campaign, and then there's the Campaign That Shall Not Be Known As a Campaign.What's that? It's the angling by prominent Republicans who hope to end up on the GOP ticket as the vice presidential candidate.All sorts of Republicans are making a point of keeping themselves in the national spotlight. And that's stoking speculation that they're positioning themselves as potential running mates.Among those being watched: Florida's Sen. Marc Rubio, governors in South Carolina, Virginia and Indiana and plenty of others.It's too early to know who's really interested and who's just savoring a little extra attention. But it's already clear there is no shortage of ambitious Republicans.