Conversation so far:
What did Mick Mulvaney  think about Trump's America first budget?
Mick Mulvaney projected the budget will not add to the federal deficit because future tax cuts will lead to 3% GDP growth
Was Mick Mulvaney in favor of the trump America first budget?
Mick Mulvaney described it as the first time that an administration has written a budget through the eyes of the people who are actually paying the taxes.“
did Mick Mulvaney  vote for the budge?t

Question: what dispute did mulvaney and the treasury secretary have
Self-contained rewrite: what dispute did  Mick mulvaney and the treasury secretary have?