NEWARK — Senator Cory Booker of New Jersey, the former mayor of Newark who has projected an upbeat political presence at a deeply polarized time, entered the 2020 race for president on Friday, embarking on a campaign to become the nation’s second black president in a Democratic primary field that is the most diverse in American history.
Mr. Booker announced his candidacy on the first day of Black History Month to the sound of snare drums and with a clarion call for unity. In an email to supporters, he drew on the spirit of the civil rights movement as he laid out his vision for a country that will “channel our common pain back into our common purpose.”
“The history of our nation is defined by collective action; by interwoven destinies of slaves and abolitionists; of those born here and those who chose America as home; of those who took up arms to defend our country, and those who linked arms to challenge and change it,” Mr. Booker said in an accompanying video.