May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.May 2015 - Burlington, Vermont -- Bernie Sanders formally announces his candidacy for U.S. President.