Rick Santorum gave a speech to his supporters at the Amway Grand Hotel in Grand Rapids.
He said his campaign put up a good fight in his opponent's backyard.
"The people of Michigan looked into the hearts of the candidates in Michigan, and all I have to say is I love them back," said Santorum.
NPR's Don Gonyea characterized the speech as a concession speech even though he didn't formally congratulate his opponent in the speech. Santorum could pick up Michigan delegates depending on how votes in Michigan's 14 congressional districts shake out.
Santorum spent part of the speech talking about energy and how President Obama is keeping a lid on traditional energy exploration in the U.S. to the detriment of the economy.
We'll have more later from MPRN's Rick Pluta.