President-elect Donald J. Trump has won Arizona and its 11 electoral votes, The Associated Press said on Saturday night, flipping yet another swing state and bringing his final Electoral College tally to 312. With his victory in Arizona, Mr. Trump has now won all seven of this year’s battleground states. Mr. Trump’s victory over Vice President Kamala Harris in Arizona is a reversion to the state’s traditionally conservative status: It has voted for a Democrat only twice since the 1940s,...