Kevin Hassett, chairman of the Council of Economic Advisers, speaks during a briefing on September 10 at the White House in Washington, D.C. Hassett said on Friday that the US was "very, very close" to signing a trade deal with Mexico but not Canada.Trade observers say it's likely that Canada intends to use every minute of time left on the clock before the October 1 deadline, which is meant to give Congress time to quickly approve a deal before a new government with mixed feelings about the deal takes office in Mexico . . .