Booker joins a crowded and growing Democratic field that is already the most diverse in history - with multiple women, one gay candidate, a Latino and, with Booker now in the mix, two black candidates.
"I think the moment that he gets in, you're going to see activists, party folks coming out of the woodwork for him fairly quickly", said Brady Quirk-Garvan, the chair of the Charleston County Democrats in SC.
Booker's entry into the 2020 Democratic presidential nomination race was widely expected.
"He was a pro-school choice advocate but the modern Democratic Party in which he's running for the presidential nomination has moved so far to the left that he can't even bring himself to help those school children through school choice", Conway claimed.
Trump also has criticized Booker's tenure as mayor of Newark.
Booker plans to visit Iowa the weekend of February 8th and will then campaign in SC, a key primary state where African American voters will play a significant role in shaping the course of the primary.
Booker's chief accomplishment in the Senate was his involvement in the recent passing of a criminal justice reform bill. Sens. Elizabeth Warren of MA and Kirsten Gillibrand of NY have set up presidential exploratory committees, as has Pete Buttigieg, the mayor of South Bend, Indiana.
Booker said, "It is not a matter of can we, it's a matter of do we have the collective will, the American will?" He has $4.1 million left in his campaign coffers that could also be used to assist his presidential run. He sought the post again in 2006 and won.
In 2002, Booker once again took on an uphill political battle, mounting a challenge to Newark Mayor Sharpe James, an avatar of old-school political corruption. He will be able to run for a second full Senate term in 2020 while running for president, thanks to a law that New Jersey's governor signed in November. Booker recently described Carter as a "moral (giant) in America" and a model for "what I want my message to be in leadership".
And as a surrogate for the 2012 Obama campaign, Booker admonished Democratic criticism of GOP nominee Mitt Romney's business career, saying: "Stop attacking private equity".
Booker declares his goal to build an America "where we see the faces of our leaders on television and feel pride", a suggestion that political leaders should be members of minority groups, in order to build the pride of such minorities - especially African-Americans. "But I think the reward is higher, because that means more if you can inspire, versus anger", Sterzenbach said.
"People do care about the fact that the country is so divided and find a message of unity appealing, but I suspect economic messages will be stronger than that message", said Judy Reardon, a veteran New Hampshire Democratic strategist.