Republicans Donald Trump, Ted Cruz and John Kasich and Democrats Hillary Clinton and Bernie Sanders are vying for their parties' presidential nominations in the May 3, 2016 Indiana primaries.
It's primary day in Indiana, where voters take to the polls to choose between a narrowing field of presidential contenders. Democrats Hillary Clinton and Bernie Sanders will battle for delegates in their party, as the three-man GOP race between Donald Trump, Ted Cruz and John Kasich continues.
Polls show Democratic frontrunner Clinton has a narrow lead in Indiana over Sanders. The Vermont senator would have to win big against the former secretary of state to close the delegate gap between the two.
Cruz and Kasich, meanwhile, are mathematically eliminated from winning enough delegates to clinch a majority ahead of the GOP convention in July. Trump, meanwhile, has been saying his general election race against Clinton has "sort of already started."
On the Republican side, 57 delegates are at stake in the Indiana primary. On the Democratic side, 92 delegates are up for grabs. Neither is not a winner-take-all, so the delegates are awarded proportionally.
Polls close at 6 p.m. EDT in 80 of Indiana's 92 counties, and at 7 p.m. EDT in the rest of the state. So the vote count will have been under way for an hour in most of the state by 7 p.m., the earliest that a winner can be declared in either primary.
In 2012, half the vote had been reported by 8 p.m., and 95 percent by 10 p.m. Four years earlier, half the votes were counted before 9 p.m. but the state didn't get to 90 percent until nearly 1 a.m.
The Real Clear Politics polling average shows Trump with about a 9-point lead in Indiana heading into the GOP primary. Clinton, meanwhile, leads the Democratic race by about 6 percentage points.
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Material from the Associated Press was used in this report.