Unnamed senior US official cited by Bloomberg and Reuters
US sticking to its guns on dairy in NAFTA talks
Still optimistic US and Canada can reach a deal
Willing to advance only with Mexico, it's up to Canada
On China:
Tariffs are focused on goods with international substitutes
Believe China trade action in US long-term interest
US open to meeting China but nothing scheduled yet
Optimistic there is a positive way forward with China on trade, that's what Trump wants
US not ready to announce a date for next round of tariffs, assessing China's latest response
Chinese officials will be in New York next week at UN meetings.
Governments often send out 'unnamed' officials to send messages.
