Joe Biden and Beto O'Rourke celebrated Biden's big Dallas rally at a Whataburger

Former Vice President Joe Biden had quite a night on Monday. At a rally in Dallas, three former Democratic presidential rivals endorsed his bid for president, giving him a potential boost heading into Super Tuesday. Texas is the second-biggest delegate haul in Tuesday's primaries, after California, and it can't hurt Biden's chances that he followed up the rally by celebrating with a burger and a shake at a Whataburger with one of his endorsers, former Rep. Beto O'Rourke (Texas). Beto, being Beto, livestreamed the meal on Facebook.

He probably needn't have. The other Whataburger patrons cheered Biden and O'Rourke when they arrived, and people posted on Twitter.

Beto probably chose the restaurant.

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Biden has a slight edge over main rival Sen. Bernie Sanders (I-Vt.) in Texas, according to FiveThirtyEight's model, but the race is essentially a dead heat. Sen. Elizabeth Warren (D-Mass.) and Michael Bloomberg are expected to pick up some of Texas' 228 pledged delegates as well.