"According to polling, as well as anecdotal evidence, an unusually large number of Republicans and independents may cast their votes in the Democratic contest next week, a prospect that could tip the outcome of what polls show is now a tight race. Such defections could also affect the many local and state legislative primaries around the state.
"An American Research Group poll released Monday showed Obama leading Clinton, 71 percent to 25 percent, among Texas independents and Republicans who are likely to vote in the Democratic primary.
"There is scattered evidence across the state that some Republicans may be voting Democratic, at least for a day. In one precinct in the suburban Houston neighborhood of Kingwood, where 82 percent of voters cast ballots for President Bush in 2004, Democrats were outvoting Republicans 4-to-1 last week in early voting.
"Daron Shaw, a political science professor at University of Texas, said surveys he conducted in two state legislative districts in the Dallas-Fort Worth area revealed that almost a quarter of voters with a history of voting in GOP primaries planned on participating in the Democratic primary.
"The argument I've seen is, 'Let's get rid of Clinton once and for all,' " said Ralph Bordie, who conducts the IVR Poll in Texas.
"Bordie's latest statewide poll released last week found that 15 percent of Texas Republicans who said they will support the GOP nominee in November plan nonetheless on voting for Obama next week."
http://www.chron.com/disp/story.mpl/politics/5569829.htmlHow much of Obama's support is from Republicans who have no intention of supporting him in the general?