A heavy voter turnout is expected Tuesday as Texans cast ballots in the Democratic and Republican primaries.
State election officials say there has already been a record-shattering early vote in today's primaries.
Polls show Hillary Rodham Clinton and Barack Obama are running neck-and-neck in the Democratic presidential primary, while John McCain is leading Mike Huckabee in the GOP primary.
Texas will hold party caucuses after the polls close at 7 p.m. Tuesday.
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