Did Rush's request that Republicans Vote for Clinton in Texas Change Votes?

Clinton's win in Texas is being called into question by the fact that Rush asked Republicans to vote for her. If Clinton wins the nomination, it will just add to the hurt feelings and division factor among the Dems.

However, the Dallas Morning News notes:

Conservative radio host Rush Limbaugh had urged Texas Republicans to cross over and vote for Clinton to slow Obama. Republicans made up twice as big a slice of the Democratic primary electorate as they did in 2000 and 2004, but they were trending slightly toward Obama. . . . .

The Dallas Morning News asked the wrong question however. What would have been the Republican vote for Obama if Limbaugh hadn't done that.