President Trump defended his conduct related to the investigation into his campaign’s ties to Russia and made several misleading claims on Thursday afternoon.

In a joint news conference with President Juan Manuel Santos of Colombia, Mr. Trump denied there was any collusion between his campaign and Russian officials, explained why he had fired James B. Comey as F.B.I. director and trumpeted his legislative agenda. Here’s an assessment.

Mr. Trump contradicted Deputy Attorney General Rod J. Rosenstein and his own earlier statement on firing Mr. Comey.

Explaining the ousting of Mr. Comey, Mr. Trump again pointed to Mr. Rosenstein’s “very, very strong recommendation,” adding that he believed it had resulted from Mr. Comey’s “poor, poor performance” in a congressional hearing this month.

But just hours earlier on Thursday, Mr. Rosenstein told the full Senate that Mr. Trump had made his decision before Mr. Rosenstein wrote the memo. Mr. Trump himself claimed full responsibility a week earlier.