Trump’s dinner disaster sparks new rules for his campaign

Donald Trump is betting he can win his way back to the White House by reviving the outsider appeal that fueled his success in 2016.

But his dinner with a Holocaust-denying white nationalist and a rapper who has spewed antisemitic conspiracies is demonstrating the risks of that approach. It underscores the dangers of his limited campaign operation and leaves the former president subject to stinging criticism from fellow Republicans who increasingly see him as a liability for their party after a lackluster showing in this year’s midterm elections.

In an...