Democratic presidential candidate and Sen. Bernie Sanders (I-VT) was not impressed by Wednesday’s Republican primary debate.

“The evening was really pretty sad,” Sanders wrote in a Facebook post. “This country and our planet face enormous problems. And the Republican candidates barely touched upon them tonight. And when they did, they were dead wrong on virtually every position they took. The Republican Party cannot be allowed to lead this country.”

“That’s why we need a political revolution,” he added.

Sanders also made clear as he live-tweeted the debate that he found the discussion lacking:

Waiting, waiting, waiting. Will we hear anything about racial justice, income inequality or making college affordable? #DebateWithBernie — Bernie Sanders (@BernieSanders) September 17, 2015