showing in michigan even though it was mitt romney s home state. santorum coming in just three percentage points behind former governor romney. here s a possible reason for the tight race. michigan allows democrats to vote in its republican primary and there was a push to get some of these democrats to vote for santorum. in fact, that was the thrust of robo calls heard around the state over this past week, take a listen. on tuesday, join democrats who are going to send a loud message to massachusetts s mitt romney by voting for rick santorum for president. this call is supported by hard-working democratic men and women and paid for by rick santorum for president. jon: chief washington correspondent james rosen live in our d.c. bureau with more. james? reporter: i love this game, jon. mitt romney called it a dirty trick, attempted kidnapping of gop primary process. rick santorum suggested rob robocalls romney campaign