 Obama and Clinton were in a statistical dead heat in Texas, according to a poll released February 25, 2008.During Obama's sweep of February's post-Super Tuesday primaries and caucuses, the March 4 primaries of Texas and Ohio were seen as a firewall for the Clinton campaign.In early polls for these states, Clinton held double digit leads in polls for those states, but by the end of February Obama had started to erode Clinton's lead in her key demographics, and her lead had been reduced to single digits in some polls.