WASHINGTON (AP) — Struggling Democratic presidential candidates are facing the bad news that they are not among the 10 who have qualified for the next debate, a predicament that is likely to spell doom for their campaigns. Hours ahead of a midnight Wednesday deadline to qualify, New York Sen. Kirsten Gillibrand announced she was dropping out of the race after spending at least $4 million on advertising in recent months to qualify. Billionaire climate change activist Tom Steyer, Montana Gov. Steve Bullock and self-help guru Marianne Williamson were also among those missing September’s debate, as were Colorado Sen. Michael Bennet, Hawaii Rep. Tulsi Gabbard and a handful of others. To appear on stage in Houston next month, they had to hit 2% in at least four approved public opinion polls while securing 130,000 unique donors . Two new polls released Wednesday affirmed that they were all below the threshold. “Our rules have ended up less inclusive … than even the Republicans,” Bullock said on MSNBC, referring to the thresholds set by the Democratic National Committee. “It is what it is.” The 10 candidates who qualified for September’s debate are Joe Biden, Cory Booker, Pete Bu...