As President Trump travels north to Canada to attend the G7 summit, Canadian officials have been heading south to try to stem a wave of undocumented immigrants headed their way.

In what has become an increasingly regular mission, Canadian representatives visited the U.S this week to warn immigrants fearful over President Trump’s immigration crackdown that they can’t simply rush north of the border to find safe haven.

Randy Boissonnault, a liberal member of Parliament and a special advisor to Canadian Prime Minister Justin Trudeau, visited South Florida this week to try to educate would-be immigrants about the limitations of the Canadian immigration system.

In the past year, Canada has seen bursts of U.S.-based immigrants crossing illegally into Canada, mostly into the Quebec province that borders New York and other northeastern U.S. states.