It’s going to be a tight race Tuesday, at least in Tennessee, where a recent poll shows Mitt Romney and Rick Santorum within just a few percentage points of each other. Santorum is slightly leading the fomer Massachusetts governor 35 to 31, but this small advantage is within the poll’s margin of error, so consider the two tied. Tennessee is just one of 10 states holding its primary election on Super Tuesday, and it has five valuable delegates. The results of a recent Ohio poll are almost exactly the same, but in reverse: Romney is leading Santorum among Ohio voters 34 percent to 31 percent. Ohio, a swing state, will also vote on Super Tuesday.