Donald Trump's endorsement of construction company co-owner Tim Michels in Wisconsin's hotly contested governor's race threatens to further divide Republicans and upend the race less than two months before the primary.
Trump's backing of Michels, a late entry into the race, comes after former Lt. Gov. Rebecca Kleefisch has spent years laying the groundwork for a run and building support, including winning key endorsements from the state's powerful business and manufacturing lobbying group and former Gov. Scott Walker.
