Beto O’Rourke outraised all Democratic presidential candidates in the first 24 hours after launching his campaign.

O’Rourke raised $6.1 million in the first 24 hours, his campaign said Monday. Bernie Sanders raised $5.9 million in the first 24 hours of his campaign.

O’Rourke raised $6,136,763 in online donations from all 50 states in the first day, his campaign said. California Sen. Kamala Harris at $1.5 million.

The Republicans will step up their attacks on the former Texas congressman. The RNC posted an anti-Irish tweet of O’Rourke in an attack on his DUI arrest. The stunt immediately backfired as Twitter users clapped back by calling out the hypocrisy. George W. Bush, Dick Cheney, Rep. Matt Gaetz and Donald Trump Jr. all have DUIs.