The Battle for Joe Biden

He’s not listening to Twitter. So who does have the candidate’s ear?

For months, President Trump’s re-election team has been test-driving possible lines of attack against Joe Biden: He’s sleepy. He’s creepy. He’s corrupt. He’s soft on China. He’s soft in the head. So far, nothing has stuck. Which may explain why one theme Mr. Trump and his supporters have latched onto is that, whatever you think of Mr. Biden personally, he is “a helpless puppet of the radical left.”

To which the radical left would surely respond: If only!...