Both presidential frontrunners extended delegate leads after another round of votes.
FOX's Jared Halpern has more from Washington:
Donald Trump secured nearly half of all the delegates doled out in last night's four Republican contests. 71 for the frontrunner, it brings his total as projected by the AP to 458.
To clinch the nomination and avoid a contested convention in July, a candidate needs to win at least 1,237 delegates, a task that could become easier next week as some states become winner-take-all, including delegate rich Florida and Ohio.
Hillary Clinton and Bernie Sanders split last night's primaries in Michigan and Mississippi, though Clinton won the delegate count, and is now more than half way to the tally she needs to clinch the Democratic nomination.
In Washington, Jared Halpern, FOX News.