Trump and GOP mount coordinated campaign to paint Biden as senile

The president settles on a schoolyard strategy to take out his likely general election opponent.

President Donald Trump stood before about 500 of the Republican Party’s biggest patrons at his Mar-a-Lago resort on Friday and raised a topic few in the audience expected: Joe Biden’s mental capacity.

Trump walked the donors through a list of Biden’s recent verbal stumbles, such as his recent declaration that he was running for Senate and his assertion that 150 million Americans had been killed by gun violence since 2007. Trump questioned whether the former...