SAN ANTONIO, March 31 (UPI) -- The leader in a South Texas primary race for Congress keeps changing as new votes are uncovered in the region with a checkered voting history.

DALLAS, March 10 (UPI) -- Veteran Rep. Ciro Rodriguez, D-Texas, won a narrow victory over challenger Henry Cuellar in the Texas primary, according to unofficial returns Wednesday. Rodriguez, a four-term incumbent, won the Democratic nomination in the 28th District by only 151 vote