Ohio Gov. John Kasich finished third in Michigan, behind Trump and Cruz. It wasn't the boost he was looking for heading into next week's crucial contest in his home state.



For Florida Sen. Marco Rubio, Tuesday marked the latest in a series of disappointing nights. He emerged from Michigan and Mississippi with no new delegates, a grim outcome for a candidate who has the overwhelming support from Republican senators, governors and other elected officials.



Rubio insisted he would press on to his home state's primary in Florida next Tuesday.



"It has to happen here, and it has to happen now," Rubio told supporters during a rally in Sarasota.



If Rubio and Kasich can't win at home, the GOP primary appears set to become a two-person race between Trump and Cruz. The Texas senator is sticking close in the delegate count, and with seven states in his win column he's argued he's the only candidate standing between the brash billionaire and the GOP nomination.



During a campaign stop at a North Carolina church, Cruz took on Trump for asking rally attendees to pledge their allegiance to him. He said the move struck him as "profoundly wrong" and was something "kings and queens demand" of their subjects.



Some mainstream Republicans have cast both Trump and Cruz as unelectable in a November face-off with the Democratic nominee. But they're quickly running out of options — and candidates — to prevent one of the men from becoming the GOP standard-bearer.



The economy ranked high on the list of concerns for voters in Michigan and Mississippi. At least 8 in 10 in each party's primary said they were worried about where the American economy is heading, according to exit polls conducted by Edison Research for The Associated Press and television networks.



Among Democrats, 8 in 10 voters in both states said the country's economic system benefits the wealthy, not all Americans.



Sanders has sought to tap into that concern, energizing young people and white, blue-collar voters with his calls for breaking up Wall Street banks and making tuition free at public colleges and universities. Michigan, with big college towns and a sizeable population of working-class voters, was a good fit for him, though something of a surprise victory given that Clinton had led in polls heading into Tuesday's voting.