Joe Biden's path to the Democratic presidential nomination widened significantly Tuesday with commanding victories in Mississippi, Missouri and Michigan, a state that his rival Bernie Sanders won four years ago. Key takeaways:
IT'S BIDEN'S NOMINATION TO LOSE
Biden has become the reliable Buick of this race.
His momentum accelerated as he broadened his delegate lead over Sanders with a series of decisive victories. The former vice president's solid win in Michigan came in a state Sanders was depending on both to bolster his case going forward and for the practical delegate math involved. He came into the day about 96 delegates behind Biden, and Michigan was his best shot at preventing that lead from getting any wider. (Democrats require 1,991
