welcome back to our politics lead. the white house now has one week to decide whether to participate in the judiciary committee's impeachment proceedings which kick off next week on capitol hill. as alex marquardt reports this comes as new questions about the testimony of a key witness, one the president claims clears him of any wrongdoing. >> reporter: a new showdown brewing on capitol hill. the chairman of the house judiciary committee jerry nadler this afternoon sending a letter to the president asking him to replily next friday saying whether he'll -- whether he'll participate in the next round of impeachment hearings. no response from the white house but trump is not expected to be there. stef yn a grisham said the president has done nothing yong and the democrats know it. >> when you complain and complain and have the opportunity to put your story to the american public and you