Celebrity endorsements in an election year are hardly a new phenomenon. But former President Donald Trump’s appearance alongside Puerto Rican reggaeton star Anuel AA forms part of a larger emerging pattern in his campaign’s outreach to voters of color — and signals the campaign might see an opportunity in battleground Pennsylvania.... First greeting the former president on the tarmac, Anuel, born Emmanuel Gazmey Santiago, later endorsed Trump during his rally in Johnstown, Pennsylvania, on Friday, telling Puerto Ricans to “stay united” and to “vote for Trump.”...While the immediate crowd might not be familiar with the star, Anuel’s magnitude as a...