The Big Conversation:
Dwarfed by presidential politics, the race for U.S. Senate in Texas remains fluid, according to the new University of Texas/Texas Tribune poll.
Among Republicans, Lt. Gov. David Dewhurst, the race's presumptive front-runner, leads handily, with 22 percent of the vote, 12 points ahead of his closest competitor, former Solicitor General Ted Cruz, at 10 percent. Former Dallas Mayor Tom Leppert ties U.S. Rep. Michael McCaul, R-Austin, at 5 percent (though McCaul announced last week, on the last day the poll was being conducted, that he wouldn't run for the seat).
But 50 ...