Booker snags first Senate endorsement
© Greg Nash
Sen. Bob Menendez (D-N.J.) endorsed fellow New Jersey Sen. Cory BookerCory Anthony BookerWarren unveils plan to cancel student loan debt, create universal free college The Hill's Morning Report - Is impeachment back on the table? Booker: Barr's suggestion of spying on Trump campaign 'eroded' public's trust MORE's (D) presidential bid on Friday, making him the first senator to endorse a colleague in the party's crowded 2020 race. 

"I can't think of anyone better to represent and unite the American people. Cory makes a great friend, and will make an even greater president. I can't wait to support you on this journey—I'm all in!" Menendez said in a tweet on Friday.  
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Booker made his long-anticipated announcement that he was running for the party's 2020 nomination Friday morning, the first day of Black History Month.
 
Menendez's endorsement of Booker isn't a surprise. The two New Jersey lawmakers have been close partners in Congress. Booker also testified on Menendez's behalf during his corruption trial in 2017. 
 
Though Menendez is the first senator to endorse a fellow senator during the 2020 cycle, some lawmakers have thrown their support behind other candidates. Sen. Dianne FeinsteinDianne Emiel FeinsteinDems reject Barr's offer to view Mueller report with fewer redactions Five takeaways from Mueller's report Only four Dem senators have endorsed 2020 candidates MORE (D-Calif.) said last month that she would back former Vice President Joe BidenJoseph (Joe) Robinette BidenWarren unveils plan to cancel student loan debt, create universal free college Moulton enters 2020 White House race The Hill's Morning Report - Is impeachment back on the table? MORE if he ran. Feinstein's California counterpart, Sen. Kamala HarrisKamala Devi HarrisWarren unveils plan to cancel student loan debt, create universal free college Moulton enters 2020 White House race The Hill's Morning Report - Is impeachment back on the table? MORE (D-Calif.), is also running for president and won Rep. Ted LieuTed W. LieuDems push back on White House suggesting they're 'not smart enough' for Trump's tax returns Civil rights attorney confronts Candace Owens on Fox News Lieu fires back at GOP lawmaker who claims he was 'owned' by Candace Owens: 'She said what she said' MORE's (D-Calif.) endorsement. 
 
Several Senate Democrats have already announced White House bids, including Sens. Kirsten GillibrandKirsten Elizabeth GillibrandWarren unveils plan to cancel student loan debt, create universal free college Cory Booker has a problem in 2020: Kamala Harris Booker to supporter who wanted him to punch Trump: 'Black guys like us, we don't get away with that' MORE (D-N.Y.) and Elizabeth WarrenElizabeth Ann WarrenTrump pushes back on impeachment talk: 'Tables are finally turning on the Witch Hunt!' Warren unveils plan to cancel student loan debt, create universal free college Moulton enters 2020 White House race MORE (D-Mass.), or are viewed as potential 2020 contenders like Sen. Sherrod BrownSherrod Campbell BrownOnly four Dem senators have endorsed 2020 candidates Budowsky: 2020 Dems should debate on Fox Overnight Health Care: How 2020 Dems want to overhaul health care | Brooklyn parents sue over measles vaccination mandate | Measles outbreak nears record MORE (D-Ohio) and independent Bernie SandersBernard (Bernie) SandersThe biggest challenge from the Mueller Report depends on the vigilance of everyone GOP Senate campaign arm hits battleground-state Dems over 'Medicare for All,' Green New Deal Warren unveils plan to cancel student loan debt, create universal free college MORE (Vt.), who caucuses with Democrats. 
 
 
Asked if he would support Gillibrand, Schumer told reporters that they work "very well" together, but he was not "mixing in" the 2020 fight. 
 
"I have said to every candidate who has asked me, let a thousand flowers bloom. Let’s get a lot of people out there and see who the best candidate to beat Donald TrumpDonald John TrumpTrump calls Sri Lankan prime minister following church bombings Ex-Trump lawyer: Mueller knew Trump had to call investigation a 'witch hunt' for 'political reasons' The biggest challenge from the Mueller Report depends on the vigilance of everyone MORE is. I don’t know who that is right now," Schumer said.