The Senate Intelligence Committee ― which is also probing connections between the Trump team and Russian officials ― does not necessarily need to have proof that the tapes exist in order to subpoena them, Bradley Moss, a national security lawyer, told HuffPost. Senate investigators could ask for “any recording devices or backup copies that were referenced in the post made by President Trump on the morning of May 12, with respect to recordings with President Trump and Director Comey,” said Moss.

Senate Intelligence Committee Exploring Ways To Obtain Trump’s Comey ‘Tapes’ | HuffPost

hmmm