Again, answer questions about WHAT?
It has been over a year now, and Democrats / Mueller have not even proved that a crime has been committed yet...which makes this one huge FISHING EXPEDITION.
Mueller and his team have already proven that they are focused on playing 'Gottcha', trying to get people to incriminate themselves under oath during an investigation that has no crime to investigate.
'Collusion' is not a crime.
Even if it was, there is no evidence that Trump engaged in any with the Russians...as opposed to all of the evidence proving Mueller, Holder, Comey, Lynch, Hillary, McCabe, and Obama DID!
Trump should declare hew will only honor the subpoena if Mueller can prove that there was a crime committed. Even then, knowing this is a set up...and knowing Hillary lied her ass off before Congress - being allowed to testify without being under oath so she could get away with lying, Trump should refuse to take part in the Witch Hunt by simply pleading the 5th....like just about all of the Democrats have done to escape punishment for their PROVEN crimes.