Back on Capitol Hill, Trump and his administration are facing mounting questions about Trump’s son-in-law and senior adviser Jared Kushner, who is now a focus of investigations into whether Trump’s campaign colluded with Russia to allegedly influence the 2016 election. The New York Times reports that in mid-December Jared Kushner met with Russian banker Sergey Gorkov, who was under U.S. sanctions, as part of Kushner’s efforts to establish a secret back channel with Russia after the election. The meeting is now reportedly being probed by federal and congressional investigators.

Trump himself blasted news reports over the weekend about Kushner’s attempts to establish a secret back channel with Russia, writing: “Whenever you see the words ‘sources say’ in the fake news media, and they don’t mention names, it is very possible that those sources don’t exist but are made up by fake news writers. #FakeNews is the enemy!” This was part of Trump’s first controversial tweet storm in more than a week; Trump had refrained from incendiary tweets during his trip abroad.

Meanwhile, CNN is reporting, based on unnamed former intelligence officials, that U.S. spies intercepted Russian officials discussing having potentially “derogatory” information about Trump and his top aides during the 2016 campaign. A White House spokesperson has denied the report.

All this comes as Trump’s communications director, Michael Dubke, has resigned.