Cruz proceeded to list a number of conservative Facebook pages that had faced censorship from the social network. (Read more from "Watch Ted Cruz Savage Mark Zuckerberg Over Facebook's Liberal Bias" HERE )  Zuckerberg Apologizes, Promises Reform as Senators Grill Him Over Facebook's Failings By The Washington Post. Facebook chief executive Mark Zuckerberg endured an hours-long grilling by dozens of U.S. senators Tuesday during which he repeatedly apologized and promised privacy reforms but also pointedly defended his company against the threat of new legislation. Zuckerberg invoked Facebook's unlikely journey — from a tiny start-up he co-founded in his Harvard dorm room 14 years ago to a social media behemoth — in explaining Facebook's frequent privacy missteps and its failure to spot and defeat Russia's aggressive campaign to manipulate American voters in 2016 and beyond.