Biden keeps up his attack on 'sleepy Don' with a slew of jokes aimed at Trump at the White House Correspondents' dinner

Tom Brenner/Reuters

• Joe Biden used his speech at the White House Correspondents' Association dinner to mock Donald Trump.
• "Yes, age is an issue. I'm a grown man, running against a six-year-old," Biden said.
• Biden has been using humorous and sarcastic jabs to ramp up his attacks on Trump.

Often referred to as Washington's "nerd prom," hundreds of journalists, politicians, and...