WASHINGTON (AP) — President Donald Trump on Tuesday called on Attorney General William Barr to immediately launch an investigation into unverified claims about Democrat Joe Biden and his son Hunter, effectively demanding that the Justice Department muddy his political opponent and abandon its historic resistance to getting involved in elections.

With just two weeks to go before Election Day, Trump for the first time explicitly called on Barr to investigate the Bidens and even pointed to the nearing Nov. 3 election as reason that Barr should not delay taking action. Trump has been leveling accu...