White House press secretary Sarah Huckabee Sanders responds to allegations from Sam Nunberg.
KRISTEN WELKER, NBC NEWS: Sarah, I want to ask you about some breaking news that we're just getting. Sam Nunberg, the president's former campaign aide, is refusing a subpoena by a grand jury, and he just said on MSNBC moments ago, "I think he (meaning the president) may have done something during the election, but I don't know that for sure. Your reaction?
SARAH HUCKABEE SANDERS, WHITE HOUSE: Well, I definitely think he doesn't know that for sure, because he's incorrect. As we've said many times before, there was no collusion with the Trump campaign. Anything further on what his actions are -- he hasn't worked at the White House, so I certainly can't speak to him, or the lack of knowledge that he clearly has.
WELKER: What's your reaction to him not cooperating with the grand jury -- refusing this subpoena? Would you encourage all of these witnesses to come forward and tell their stories?
SANDERS: Look, I'm not going to weight in to somebody that doesn't work at the White House. I can tell you from our perspective, we are fully cooperating with the office of the special counsel. We're going to continue to do so, and I'll reiterate once again, the reason we are so comfortable doing so is because there was absolutely no collusion within the Trump campaign and any foreign government.