Senior U.S. and Canadian trade officials are working to finalize a potential agreement that could be presented to U.S. President Donald Trump as early as Monday, Canada's CBC reported, citing unnamed sources.

The Tuesday report said that the joint proposal could reach Trump at least a day before an Aug. 19 deadline, giving him time to make a final decision before new 50% tariffs on hundreds of Canadian imports are set to take effect.

Canada-US Trade Minister Dominic LeBlanc and U.S. Trade Representative Jamieson Greer LeBlanc are meeting in Washington on Tuesday, their third face-to-face meeting in three weeks. LeBlanc’s trip was delayed after his flight was diverted to Montreal on Monday due to severe weather.

Canada's chief trade negotiator, Janice Charette, also spent Monday in Washington meeting with U.S. trade officials. Neither LeBlanc nor Charette will comment on the negotiations, the report said.

Beyond seeking to prevent new tariffs, Canada wants relief from U.S. tariffs on steel, aluminum, lumber, and autos, and hopes the talks will lead to an extension of the Canada-U.S.-Mexico Agreement.

Last month, Washington also announced additional tariffs of 50% on certain Canadian goods, covering products ranging from wine and hockey sticks to cement, according to the White House.