LOADINGERROR LOADINGSen. Cory Booker Officially Joins 2020 Presidential RaceNew Jersey Sen. Cory Booker (D) will be joining President Donald Trump, Sen. Kirsten Gillibrand (D-N.Y.) and Sen. Kamala Harris (D-Calif.) in the 2020 presidential race.By HuffPost VideoHuffPost VideoVideos For You