Booker snags first Senate endorsement
© Greg Nash
Sen. Bob Menendez (D-N.J.) endorsed fellow New Jersey Sen. Cory BookerCory Anthony BookerInslee unveils plan to fight fossil fuel pollution The Memo: All eyes on faltering Biden ahead of first debate Progressive group launches campaign to identify voters who switch to Warren 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 FeinsteinYoung activists press for change in 2020 election The Hill's Morning Report — US strikes approved against Iran pulled back Democrats want White House hopefuls to cool it on Biden attacks MORE (D-Calif.) said last month that she would back former Vice President Joe BidenJoe BidenBiden, Eastland and rejecting the cult of civility Inslee unveils plan to fight fossil fuel pollution Biden lays out immigration priorities, rips Trump for 'assault on dignity' MORE if he ran. Feinstein's California counterpart, Sen. Kamala HarrisKamala Devi HarrisThe Hill's Morning Report - Crunch time arrives for 2020 Dems with debates on deck The Memo: All eyes on faltering Biden ahead of first debate 2020 primary debate guide: Everything you need to know ahead of the first Democratic showdown MORE (D-Calif.), is also running for president and won Rep. Ted LieuTed W. LieuDemocrats call for restraint, oversight as Trump reportedly calls back Iranian strike Report: Iranian officials say Trump warned them attack was imminent Trump approved Iranian strike before pulling back: report MORE's (D-Calif.) endorsement. 
 
Several Senate Democrats have already announced White House bids, including Sens. Kirsten GillibrandKirsten Elizabeth GillibrandJuan Williams: Warren on the rise 2020 primary debate guide: Everything you need to know ahead of the first Democratic showdown 2020 Democrats vow to expand abortion access at Planned Parenthood event MORE (D-N.Y.) and Elizabeth WarrenElizabeth Ann Warren2020 Democrat: 'My DM's are open and I actually read & respond' Group of wealthy Americans write open letter asking to be taxed more Inslee unveils plan to fight fossil fuel pollution MORE (D-Mass.), or are viewed as potential 2020 contenders like Sen. Sherrod BrownSherrod Campbell BrownDemocrats talk up tax credits to counter Trump law Facebook's new cryptocurrency raises red flags for critics Hillicon Valley: Senate sets hearing on Facebook's cryptocurrency plans | FTC reportedly investigating YouTube over children's privacy | GOP senator riles tech with bill targeting liability shield | FAA pushed to approve drone deliveries MORE (D-Ohio) and independent Bernie SandersBernie SandersThe Hill's Morning Report - Crunch time arrives for 2020 Dems with debates on deck The Memo: All eyes on faltering Biden ahead of first debate Progressive group launches campaign to identify voters who switch to Warren 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 TrumpConway defends herself against Hatch Act allegations amid threat of subpoena How to defuse Gulf tensions and avoid war with Iran Trump says 'stubborn child' Fed 'blew it' by not cutting rates MORE is. I don’t know who that is right now," Schumer said.