evidence: As the once-broad 2020 Democratic primary field condenses, four potential front-runners have pushed ahead: Progressive darlings Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.), and Wall Street favorites former Vice President Joe Biden and South Bend, Ind., Mayor Pete Buttigieg. But while Biden still leads in the polls, when it comes to opening hearts (and wallets) of business leaders across America, Buttigieg is shining. [...] Wall Streeters may be hedging their bets on Biden by backing Buttigieg, said Shrum, but they’re not giving up on Biden just yet. [...] Joe Trippi, a political strategist who ran campaigns for Alabama Senator Doug Jones and 2004 presidential hopeful Howard Dean, still thinks Wall Street backs Biden but that they’re looking to Buttigieg as the future of the Democratic party.