We might have to wait until July 31 to figure out who will be our nominees for U.S. Senate, despite recent polls indicating Lt. Gov. Dewhurst could win the Republican Senate nomination on primary night. A University of Texas/Texas Tribune poll shows both the Republican and Democratic races heading to a runoff.

Dewhurst is at 40 percent among likely Republican primary voters, Ted Cruz is behind him with 31 percent. Tom Leppert has seen a boost, he’s at 17 percent. Former ESPN analyst Craig James is polling at 4 percent.

Democrats are even more split on who their nominee should be. Former State Rep. Paul Sadler, 29 percent, is the frontrunner, but by only 4 points. Sean Hubbard is at 25 percent.

Be sure to tune in to YNN on primary night for continuing live coverage. Our Capital Commentators Ted Delisi and Harold Cook will join us, as well as the Quorum Report‘s Harvey Kronberg and broadcaster Scott Braddock. We will also speak to UT Pollster and politics professor Jim Henson. Coverage begins at 4 p.m.