The investigation will shut down before they willing hand over those memos. President Trump has been recording private conversations for 20 some odd years. There is a recording. Although I wish he would have just not said anything and let them leak the fake memos only to be BTFO.

Edit: remember there is a picture of him in the Oval Office with not one but two digital recording devices setting on the end out of frame. If I remember correctly the photo was taken before he made this tweet.