WASHINGTON (AP) — The fate of the United States presidency hung in the balance Wednesday morning, as President Donald Trump and Democratic challenger Joe Biden battled for three familiar battleground states — Wisconsin, Michigan and Pennsylvania — that could prove crucial in determining who wins the White House.

A late burst of votes in Wisconsin from Milwaukee gave Biden a small lead, but it was too early to call the race. Hundreds of thousands of votes were also outstanding in Michigan and Pennsylvania.

The two candidates, who have proposed dramatically different visions for the nation, spli...