Republican ex-President Donald Trump and Democratic President Joe Biden on Tuesday expect to notch decisive victories in Michigan's primary elections that will bolster their campaigns heading into Super Tuesday next week. Both candidates face challengers within their own parties, but those few remaining rivals pose little threat to the front-runners, neither of whom have lost a single nominating contest this cycle. Republican former United Nations ambassador Nikki Haley has vowed to keep up the fight against Trump, even after losing by 20 points in her home state of South Carolina over the weekend. Yet, Haley still netted roughly 40% of the vote, making it less of a rout than many polls ahead of the race had anticipated. The results indicated to some political analysts t