During an April 18, 2017 speech in Paul Ryan’s hometown of Janesville, Wisconsin, Trump repeatedly referred to the former Speaker of the House as Ron.

The mistake came after Trump and Ryan worked together for months on a new healthcare plan that ultimately never materialized.

Trump and Ryan were often at odds with each other during the campaign, particularly after Ryan referred to Trump’s remarks about a Mexican-American judge as racist.

Trump also called national security advisor John Bolton “Mike Bolton,” Vice President Mike Pence “Mike Pounce,” and Apple CEO Tim Cook “Tim Apple.”

GQ – Donald Trump Kept Calling Paul Ryan “Ron” at a Wisconsin Event
Independent – Donald Trump forgets Paul Ryan’s name and calls him Ron twice
Politico – Inside Trump’s Feud With Paul Ryan