CNN contributor Paul Begala questioned some Democratic presidential candidates’ strategies of attacking former New York City Mayor Michael Bloomberg during the party’s last primary debate.

Begala, a strategist for former President Bill Clinton, ripped the five presidential candidates who joined Bloomberg on the debate stage in Las Vegas Wednesday night for attacking him even though he is not participating in the Nevada caucus this weekend. When asked what he thought of the debate on CNN Thursday morning, Begala began by calling the event “a gift to Bernie Sanders,” whom he deemed the front-runner.