Mr Trump started by saying: “Who the hell wants to speak about politics?”
But his speech to the Jamboree in West Virginia railed against Barack Obama, Hillary Clinton and the “cesspool” of politics, drawing whoops and cheers.
One parent wrote: “Done with scouts after you felt the need to have my kid listen to a liar stroke his ego.”
The Jamboree had issued a warning on its blog about being respectful.
It read: “Chants of certain phrases heard during the campaign (e.g. ‘build the wall’, ‘lock her up’) are considered divisive by many members of our audience, and may cause unnecessary friction.”
But in a rambling 35-minute speech, Mr Trump whipped up a response of boos, cheers, chants and jeers as he lambasted fake news, Hillary Clinton’s election campaign and President Obama’s failure to address a Jamboree in person.
Talking shit about someone to kids is never cool.