Michigan would become the fifth primary. The plan came as the president asked that “voters of color have a voice in choosing our nominee much earlier in the process.”
The president’s advisers have been working on a strategy for how the White House will respond to what they expect will be a constant stream of attacks from former President Donald J. Trump.
Requests for the first lady, who is also the president’s most popular surrogate, are piling up ahead of the midterm elections. Her visits can deliver a morale boost and a fund-raising opportunity.