Steve Kerr urged members of Congress to call out President Donald Trump on Sunday night, hours after the president lashed out at four minority, freshman congresswomen in a tweetstorm, telling them to “go back” to the countries they came from.

“Come on members of Congress, call out the president for his racist tweets this morning,” the Warriors coach tweeted. “Show some leadership. It’s the job you were elected to do.”

Kerr, a vocal critic of Trump, retweeted many posts condemning the president’s actions, including a message from The Atlantic’s Adam Serwer, who called Trump a “white nationalist.” He also tweeted a photo of the 2018 book, “How Democracies Die,” telling his followers to “add this to your summer reading list.”

In Trump’s initial tweets from Sunday, the president appears to be referring to “The Squad,” which includes Reps. Alexandria Ocasio-Cortez, Ilhan Omar, Rashida Tlaib and Ayanna Pressley. All four are US citizens and three of the women were born in the US. Omar, who was born in Somalia, became a citizen when she was 17, according to the New York Times.

This isn’t the first time Kerr has used his platform to condemn the Trump administration. While speaking to the media during the NBA Finals, Kerr wore a “Vote for our lives” T-shirt to advocate gun control following the mass shooting in Virginia Beach earlier this year.

In January, the Warriors also skipped the traditional White House visit following the 2018 NBA championship, spending time with former President Barack Obama instead. They had been previously disinvited by Trump and have not visited the White House since he took office.