Yesterday the long-developing ties between two Republican super PACs and Mitt Romney’s campaign grew stronger when the campaign announced that veteran GOP strategist Ed Gillespie would come aboard as a senior adviser. Gillespie is a founder of and adviser to American Crossroads, which has stockpiled $26.9 million so far this election cycle, much of which is expected to be spent helping the Republican nominee; it’s increasingly likely that will be Romney. Another Crossroads adviser is Carl Forti, who is also president of the pro-Romney Restore Our Future super PAC. But that’s just the tip of the iceberg. The two super PACs, awash in money, share a number of benefactors. Many of the largest donors to Crossroads are also major donors to Restore Our Future, and vice versa. And many have maxed out to the Romney campaign itself, which has been struggling, relatively speaking, to raise cash.