50 to 41%

From Eric Dondero:

In a previous poll Perry had 48% to ex-Houston Mayor Bill White's 43%. Now the libertarian-leaning Governor has widened his lead to 9%.

From Rasmussen July 15:

The latest Rasmussen Reports telephone survey of Likely Voters in the Lone Star State shows Perry with 50% support. White, a former mayor of Houston, picks up 41% of the vote. Two percent (2%) like another candidate in the race, and seven percent (7%) are undecided.

In mid-June, Perry held a 48% to 40% lead over White.