On Capitol Hill, lawmakers are ratcheting up their demands for an investigation into alleged ties between senior aides to Donald Trump and Russian officials. Republican Senator Chuck Grassley of Iowa joined California Democratic Senator Dianne Feinstein Wednesday in a letter to the Justice Department asking for transcripts of former National Security Adviser Michael Flynn’s calls with the Russian ambassador last December, before Trump’s inauguration. The calls broke U.S. law and led to Flynn’s resignation on Monday. At Wednesday’s press conference, President Trump defended Flynn.

President Donald Trump: “Michael Flynn, General Flynn, is a wonderful man. I think he’s been treated very, very unfairly by the media—as I call it, the fake media, in many cases. And I think it’s really a sad thing that he was treated so badly.”

Trump’s comment came after his press secretary, Sean Spicer, said the level of trust between the president and Flynn had eroded to the point where Trump had to demand Flynn’s resignation.