Tennessee Voters Head To The Polls

(Nashville, TN) -- A busy primary election day is on tap in Tennessee. State Representative Joe Carr says the race against tea party Senator Lamar Alexander in the Republican Senate primary is very close.
Another race figures to be much closer. Congressman Scott DesJarlais is trying to win a third term, but he's getting a strong challenge from state Senator Jim Tracy. Two other House incumbents also face credible threats.