President Donald Trump was met with loud, sustained boos and chants of "Lock him up!'' from fans at Nationals Park when he was shown on the in-stadium video screen after the third inning of Game 5 of the World Series.
The boos ended only after the video screen cut to a shot of U.S. service members waving to the crowd and then showed a message thanking the military. Trump attended the Astros-Nationals game with five wounded veterans.
Then, as Nationals starter Joe Ross took the mound to warm up for the fourth inning, fans started chanting, "Lock him up!'' in an apparent reference to ongoing impeachment proceedings against the president. Pro-Trump crowds have frequently chanted "Lock her up!'' about Hillary Clinton at the president's campaign rallies.
Trump appeared unfazed and continued waving. Later, some fans behind home plate held a sign reading "VETERANS FOR IMPEACHMENT''. Another banner appeared during the game: "IMPEACH TRUMP!''
Trump was attending his first major league game since he took office in January 2017. He did not throw out the ceremonial first pitch and arrived with no fanfare just as the game began. He was on hand for seven innings before heading back to the White House. The Astros took a 3-2 series lead with a 7-1 victory in Game 5.
Trump's entourage in a lower-tier box to the left of home plate included two Republican senators, Lindsey Graham of South Carolina and Florida's Marco Rubio. Also in the group is congressman Kevin Brady of Texas.
"I think everybody is excited,'' Nationals star pitcher Stephen Strasburg said before the game. "It's the president of the United States. So there's obviously beefed-up security. So usually the dogs that are sniffing in our clubhouse are these nice labs that are super friendly. And today there was a German shepherd that I didn't really feel comfortable petting.''
Nationals manager Dave Martinez said: "He's coming to the game. He's a fan. Hopefully he cheers for the Washington Nationals, and I hope he enjoys the game.''
Major League Baseball Commissioner Rob Manfred said he discussed with Trump whether he'd like to throw out the ceremonial first pitch, but the president declined while citing the disruption it would cause fans getting to the ballpark.
Nationals principal owner Mark Lerner told the Washington Post that Trump should be at the game, but he made clear that he did not invite Trump to throw out the first pitch, saying there were many other candidates that should be considered before Trump. Jose Andres, a prominent local restaurant owner and humanitarian, threw out the first pitch to a roaring, sustained ovation.
The Associated Press contributed to this report.