Canadian Prime Minister Justin Trudeau has turned down a White House invitation to celebrate the new regional free trade agreement in Washington with U.S President Donald Trump and Mexican President Andrés Manuel López Obrador.

Trump and López Obrador are due to meet Wednesday Washington, but Trudeau spokesperson Chantal Gagnon said Monday that while Canada wishes the U.S. and Mexico well, Trudeau won’t be there.

A U.S. official said Trudeau had scheduling conflicts with the start of Parliament, as well as issues with Canadian quarantine rules for the coronvavirus pandemic.

President Obrador said the accord, which replaces the North American Free Trade Agreement, will provide greater certainty to the three countries in their commercial relationships.

Their supply chains are deeply intertwined. During the COVID-19 pandemic, there was pressure from the U.S. government to allow some Mexican assembly plants to quickly reopen or remain open to cause less interruption.