Prime Minister Justin Trudeau said on Thursday that his phone call with U.S. President Donald Trump was “colourful” with moments of tension as the two hashed out how to bring the American-led trade war to an end.

Trudeau said negotiations are ongoing to secure some form of tariff relief for certain sectors, but warned there’s no sign that Trump is willing to drop his levies entirely and it’s likely a trade dispute will continue “for the foreseeable future.”

Trudeau said there are ongoing discussions to have all of the tariffs dropped until April 2, when Trump is expected to impose another layer of retaliatory tariffs on all countries he claims are ripping off the U.S. But those talks have not been finalized and Trudeau said he was reluctant to comment until there is something concrete to announce.