In a video posted online, Sanders began his response by refuting what he called Trump's most damaging lie during his speech: that being the claims about centuries-old dead people being sent Social Security checks, denying the the president's claim outright and claiming that he is setting up for an attack on the Social Security program.

Vermont Sen. Bernie Sanders, a political independent who caucuses with Democrats, and a small number of Democrats have been trickling out of President Trump's address. Sanders, who will deliver a response tonight on social media,