Prime Minister Justin Trudeau is expected to arrive in Washington, D.C., today to mark the 75th anniversary of the NATO military alliance.

The perilous state of war-ravaged Ukraine and the precarious position of United States President Joe Biden will both colour the leaders’ summit, which is set to formally begin Tuesday.

The upcoming U.S. election and the possibility of a second Donald Trump administration has some NATO countries concerned that the alliance’s staunchest critic will once again control its mightiest military.