Obama urges the media to scrutinize whether Trump's record actually makes him a populist.
No organization has yet taken credit for the attack, which killed at least 40 people.
"Congratulations again. Tell J.R. and everybody to put on a shirt, though."
"The people of the United Kingdom have spoken, and we respect their decision."
The VP will slam "demagogues" in politics who blame immigrants for problems.
"We fully respect the decision they have made."