Foreign Affairs Minister Chrystia Freeland is back in Washington for high-level meetings on a modernized North American Free Trade Agreement.
The latest round of talks come following a warning from a prominent congressional ally of U-S President Donald Trump that there is growing frustration in Congress regarding Canada's negotiating tactics.
House of Representatives majority whip Steve Scalise, who represents the state of Louisiana gave voice to a sentiment some trade observers say is building among members of Congress who suspect Canada is ignoring their timetable and dragging out the talks for its own political purposes.
Those critics say Freeland and her team are not ready or willing to make the needed concessions.
Freeland has yet to comment on the remarks.
She does say that Canada has been co-operative from the get go.
Freeland, who will resume talks with U-S Trade Representative Robert Lighthizer on Wednesday, maintains Canada has been negotiating in good faith throughout the entire 14 month process.
With files from Heather Seaman