Article snippet: Sens. MORE in the Democratic presidential race. Warren has been climbing in polls in recent weeks, surpassing Sanders in some surveys. But Sanders, who in 2016 was the progressive alternative to front-runner MORE in the Democratic presidential race, is holding relatively firmly in the polls. He’s been ahead of Warren and in second place in some surveys, and his team continues to believe it is being underestimated. At the next presidential debate on Sept. 12, Warren and Sanders will bookend Biden, who has retained the lead in national polls. It will be an opportunity for them to go after the front-runner or take on each other, even as sources on both sides say they will once again form a united front. Warren and Sanders — who speak privately from time to time and had one longer conversation at the end of last year, sources say — have avoided attacks on each other for the most part so far, but political observers question how long the détente will last. “The race as I see it at this point is all about who will be Biden’s main opponent and, more importantly, who will win the hard-fought match-up between Elizabeth Warren and Bernie Sanders,” said one Democratic strategist who is unaffiliated with any campaign. “It’s shaping up to be Biden versus a progressive, and that appears to be Elizabeth Warren at the moment. But does Bernie come back? And who becomes the alternative? That's the biggest question.” Democratic strategist Chris Kofinis also said the Warren-Sande... Link to the full article to read more