Trump welcomed Russian Foreign Minister Lavrov and Ambassador Kislyak to the White House at the request of Vladimir Putin, and Trump did not want photos of his meeting with these two Russians to get out to the public. Only Russian media were allowed to photograph the meeting. Trump reportedly was infuriated that the Russians put these photos on the internet.
Russians with camera equipment in the Oval Office? A national security risk? Not just my speculation, but people who've dealt with Russia and its spies.
Trump is seen here having a jolly good time with agents from a country that is hostile to the United States of America -- a good time Trump didn't want the American people to see.
Let that sink in.