On Sunday, President Trump acknowledged discussing Joe Biden and his son with Ukrainian President Volodymyr Zelensky, as Democratic calls to investigate Trump over the mounting scandal grow. Reports emerged last week that Trump tried to pressure Ukraine into investigating the former vice president and 2020 candidate, and his son, and that the administration was blocking a whistleblower complaint about the July phone call. Trump defended the call to reporters, saying no quid pro quo had taken place.

President Donald Trump: “We had a great conversation. The conversation I had was largely congratulatory, was largely corruption, all of the corruption taking place, was largely the fact that we don’t want our people, like Vice President Biden and his son, creating to the corruption already in the Ukraine.”

Biden told reporters over the weekend he never spoke to his son about his “overseas business.” Acting Director of National Intelligence Joseph Maguire, who has refused to hand over the whistleblower complaint, is set to testify before the House Intelligence Committee later this week. House Speaker Nancy Pelosi on Sunday said the failure to disclose the complaint would lead to “a new chapter of lawlessness,” while House Intelligence Chair Adam Schiff said in a CNN interview, “We may very well have crossed the Rubicon here,” and that impeachment would be the only appropriate course of action; while New York Congressmember Alexandria Ocasio-Cortez tweeted, “At this point, the bigger national scandal isn’t the president’s lawbreaking behavior–it is the Democratic Party’s refusal to impeach him for it.” Trump is scheduled to meet with the Ukrainian president Wednesday during the U.N. General Assembly.