Long shot candidate Tulsi Gabbard, the last remaining woman in the Democratic presidential race, is all but certain to be excluded from the party’s next presidential debate because of a sharp increase in Democratic National Committee qualifying thresholds.

Candidates will need to earn 20% of all delegates awarded in primary contests before March 15, as calculated by CNN or the Associated Press, to qualify for the March 15 Democratic presidential debate in Arizona, the DNC announced Friday.