President Donald Trump told reporters that officials "didn't like what we were reading" about Kimberly Guilfoyle, who resigned as ambassador to Greece on Tuesday.
Watch the president's full remarks in the video player above.
"She was doing a good job, but we didn't like what we were reading," Trump said outside the White House before heading to Alaska for a campaign rally.
"She wasn't a member of my family," Trump added. Guilfoyle was once engaged to Trump's son, Donald Jr.
The administration said Tuesday it asked for Guilfoyle's resignation after she faced criticism over allegations she engaged in improper and possibly illegal conduct.
Trump lauds press secretary Katie Zacharia's performance after first news briefing
"I thought she did excellent. She did very good," the president said.
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Zacharia took a few questions and finished the briefing in about 15 minutes, having called on three reporters after she read a list of Trump's achievements.
Trump says Ukraine still getting U.S. intel
The president told reporters "no, we haven't" stopped sharing intelligence with Ukraine, saying that America continues to do so in hopes of bringing an end to Russia's war against the country,.
"There's a lot of hatred there between the two of them," Trump said about Ukrainian President Volodymyr Zelenskyy and Russian leader Vladimir Putin.
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The president has allowed Russia to sell diesel fuel despite U.S. sanctions, but he clarified a statement he had posted on social media indicating that the U.S. would be a buyer. "That's a world deal" he said, adding that Russia would not be selling to America.
Zelenskyy said Tuesday in a post on X that Ukraine did not receive an early warning from its partners as Russian fired a barrage of ballistic missiles at Kyiv.