A man was thrown out of a Donald Trump rally in Oklahoma City after being spotted wearing a shirt with the slogan "KKK endorses Trump".
The man wore a white shirt with the slogan crudely written on it, prompting chants and booing from the crowd.
Mr Trump paused, wandering up and down the stage, until security removed the man from the venue.
"In the good old days law enforcement acted a lot quicker than this. A lot quicker," the Republican presidential frontrunner told his audience after the man had left.
"In the good old days they'd rip him out of that seat so fast, but today everyone's politically correct."
Members of the KKK attended an earlier Trump rally in Nevada, where volunteers asked caucus-goers to ignore them.
Register for free to continue reading
Registration is a free and easy way to support our truly independent journalism
By registering, you will also enjoy limited access to Premium articles, exclusive newsletters, commenting, and virtual events with our leading journalists
Already have an account? sign in
Join our new commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies