(Los Angeles Times) At first it looked like the rematch was on. Sen. Kamala Harris and former Vice President Joe Biden standing at center stage at the Democratic presidential debate in Detroit were clearly ready to reprise their prior debate face-off training their focus on each other as the debate began. But the others on stage werent ready to cede the evening to the two top candidates. Instead both Harris and Biden found themselves playing defense not just against each other but from their other rivals: Sen. Michael Bennet New Jersey Sen. Cory Booker former U.S. Housing Secretary Julin Castro New York Mayor Bill de Blasio Hawaii Rep. Tulsi Gabbard New York Sen. Kirsten Gillibrand Washington Gov. Jay Inslee and entrepreneur Andrew Yang. With qualification requirements being much tougher for the next round of debates in Houston in September it was likely the last gasp for several lower-tier candidates on stage.