Trump kicked off his speech by noting it had been tough to get to the rural location where Scouts have been camping out for the 10-day event but said he was "thrilled" to be there.
Trump invited two of his administration officials onto the stage during his speech: Energy Secretary Rick Perry and Health and Human Services Secretary Tom Price.
He decried the healthcare law championed by his predecessor, Barack Obama, regaled the crowd of cheering boys with his take on the "incredible night with the maps" when he was elected in November, and encouraged them to boo Hillary Clinton.
I am a Cub Scout leader and, more important, a dad. Jon Wolfsthal, a former special assistant to President Obama, tweeted, "Is nothing safe?" He compared Trump's speech to a "Nazi Youth rally". "Boy Scouts must repudiate such a disgraceful display".
As Trump continued to "pour poison into the ears of children", he began talking about a "very successful man" he know who bought a yacht and "had a very interesting life, the details of which he declined to mention "because you are boy scouts". "If you haven't watched it yet, don't".
Colbert translated: "Kids I come here to inspire you". "This 80-year-old custom of inviting Presidents to speak to Scouts is in no way an endorsement of any person, party or policies".
How did the BSA react?
Although many called on the Boy Scouts of America to condemn the president's speech and to apologise for exposing their sons to it, the organisation stopped well short of that, describing itself in a statement as "wholly non-partisan". The invitation for the sitting U.S. President to visit the National Jamboree is a longstanding tradition dating back to President Franklin Roosevelt in 1937.
"Please help us ensure that all Scouts can enjoy this historical address by making sure that your troop members are respectful not only of the President, but of the wide variety of viewpoints held by Scouts and Scouters in the audience tonight". The statement closes by repeating that the Boy Scouts is an organization made up of many different viewpoints, and that the Boy Scouts of America will continue to be respectful of that wide assortment of viewpoints.