Airstrike Pushes National Security to Forefront of 2020 Race

Foreign affairs have played a strictly limited role so far in the Democratic primary, but the killing of Maj. Gen. Qassim Suleimani could reshape the contest.

The American strike in Baghdad that killed the Iranian general Qassim Suleimani thrust foreign policy to the center of the Democratic presidential race, drawing expressions of grave concern from the leading candidates and stoking a new debate in the party about the American military presence in the Middle East.

The party’s presidential field reacted to the attack with a measure of unity, at least...