Sen. Bernie Sanders, I-Vt., announced Tuesday he will make another bid for president by entering the already crowded 2020 race, as he tries to rekindle the grassroots energy from his 2016 primary run against Hillary Clinton. Sanders made the announcement in an interview with Vermont Public Radio, followed by a web video and email to supporters. "Together, you and I and our 2016 campaign began the political revolution. Now, it is time to complete that revolution and implement the vision that we fought for," he told supporters.