A white mob attacked Elijah Cummings for integrating a swimming pool. He was 11.

“Miss Mitchell” told the boys there was a better pool they could swim in, Rep. Elijah E. Cummings remembered later.

He was 11 years old, and he and his friends were getting too big for the small, shallow public pool where they had been spending the summer of 1962.

“As a matter of fact, it was so small, we had to wait turns to get in,” the Maryland Democrat, who died Thursday at 68, told the Baltimore Sun in July.

But there was another pool, Miss Mitchell said. Riverside Park Pool in South Baltimore was Olympic-size, with a deep end. And it was open to the public — theoretically. In practice, it had yet to be integrated.

Over several days that August, Cummings and a group of two dozen African American boys marched to the swimming pool and jumped in.

Crowds of angry white residents, sometimes numbering 1,000, according to Sun coverage at the time, surrounded them. They held signs saying “Keep Our Pool Germ Free” and “White People Have Rights Too.”

“And these were adults,” Cummings remembered. They “called us every name you can imagine, everything but a child of God.”

They also shouted, “Go back to where you came from” — something Cummings recalled last summer as President Trump attacked him, attacked Baltimore and attacked freshman Congresswomen of color with a similar “go back” expression.