Booker snags first Senate endorsement
© Greg Nash
Sen. Bob Menendez (D-N.J.) endorsed fellow New Jersey Sen. Cory BookerCory Anthony BookerSanders expected to announce exploratory committee next week Bill Maher to Dems: ‘Let’s not eat our own’ in 2020 Dems ready aggressive response to Trump emergency order, as GOP splinters 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 FeinsteinFeinstein says she thinks Biden will run after meeting with him Trump judicial nominee Neomi Rao seeks to clarify past remarks on date rape Bottom Line MORE (D-Calif.) said last month that she would back former Vice President Joe BidenJoseph (Joe) Robinette BidenBill Maher to Dems: ‘Let’s not eat our own’ in 2020 Newsom endorses Kamala Harris for president Trump, Biden in dead heat in hypothetical 2020 matchup among Texas voters MORE if he ran. Feinstein's California counterpart, Sen. Kamala HarrisKamala Devi HarrisKamala Harris shopping trip stirs Twitter campaign trail debate Sanders expected to announce exploratory committee next week Bill Maher to Dems: ‘Let’s not eat our own’ in 2020 MORE (D-Calif.), is also running for president and won Rep. Ted LieuTed W. LieuKamala Harris shopping trip stirs Twitter campaign trail debate Newsom endorses Kamala Harris for president Hispanic civil rights icon endorses Harris for president MORE's (D-Calif.) endorsement. 
 
Several Senate Democrats have already announced White House bids, including Sens. Kirsten GillibrandKirsten Elizabeth GillibrandGillibrand backs federal classification of third gender: report Sanders expected to announce exploratory committee next week Newsom endorses Kamala Harris for president MORE (D-N.Y.) and Elizabeth WarrenElizabeth Ann WarrenDNC punts on measure to reduce role of corporate PAC money Bill Maher to Dems: ‘Let’s not eat our own’ in 2020 Newsom endorses Kamala Harris for president MORE (D-Mass.), or are viewed as potential 2020 contenders like Sen. Sherrod BrownSherrod Campbell BrownHigh stakes as Trump, Dems open drug price talks Pollster says current 2020 surveys like picking best picture Oscar before movies come out Shep Smith: Signing funding bill is a 'loss' for Trump no matter how it's packaged MORE (D-Ohio) and independent Bernie SandersBernard (Bernie) SandersSanders expected to announce exploratory committee next week Bernie Sanders records announcement video ahead of possible 2020 bid Bill Maher to Dems: ‘Let’s not eat our own’ in 2020 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 TrumpGillibrand backs federal classification of third gender: report Former Carter pollster, Bannon ally Patrick Caddell dies at 68 Heather Nauert withdraws her name from consideration for UN Ambassador job MORE is. I don’t know who that is right now," Schumer said.