Booker snags first Senate endorsement
© Greg Nash
Sen. Bob Menendez (D-N.J.) endorsed fellow New Jersey Sen. Cory BookerCory Anthony BookerSteve King to Gillibrand: Odds of me resigning same as yours of winning presidential nomination We need a climate plan for agriculture 2020 Democrats urge Israel to reverse decision banning Omar, Tlaib visit 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 FeinsteinTrump administration urges Congress to reauthorize NSA surveillance program The Hill's Morning Report - More talk on guns; many questions on Epstein's death Juan Williams: We need a backlash against Big Tech MORE (D-Calif.) said last month that she would back former Vice President Joe BidenJoe BidenPoll: Support for Sanders among college students reaches highest level since April Obama has taken active interest in Biden's campaign: report The Hill's Morning Report — Trump and the new Israel-'squad' controversy MORE if he ran. Feinstein's California counterpart, Sen. Kamala HarrisKamala Devi HarrisPoll: Support for Sanders among college students reaches highest level since April Native American advocates question 2020 Democrats' commitment Fox News poll shows Trump losing to Biden, Warren, Sanders and Harris MORE (D-Calif.), is also running for president and won Rep. Ted LieuTed W. LieuCities are the future: We need to coordinate their international diplomacy George Conway opposes #unfollowTrump movement Puerto Rico resignations spur constitutional crisis MORE's (D-Calif.) endorsement. 
 
Several Senate Democrats have already announced White House bids, including Sens. Kirsten GillibrandKirsten Elizabeth GillibrandSteve King to Gillibrand: Odds of me resigning same as yours of winning presidential nomination The Hill's Morning Report — Recession fears climb and markets dive — now what? King incites furor with abortion, rape and incest remarks MORE (D-N.Y.) and Elizabeth WarrenElizabeth Ann WarrenWarren unveils Native American policy plan Poll: Support for Sanders among college students reaches highest level since April Obama has taken active interest in Biden's campaign: report MORE (D-Mass.), or are viewed as potential 2020 contenders like Sen. Sherrod BrownSherrod Campbell BrownDayton Democrat launches challenge to longtime GOP rep Dayton mayor: Trump visit after shooting was 'difficult on the community' Consoler in Chief like Biden is the perfect antidote to a Divider in Chief like Trump MORE (D-Ohio) and independent Bernie SandersBernie SandersPoll: Support for Sanders among college students reaches highest level since April The Hill's Morning Report — Trump and the new Israel-'squad' controversy Native American advocates question 2020 Democrats' commitment 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 TrumpWarren unveils Native American policy plan Live-action 'Mulan' star spurs calls for boycott with support of Hong Kong police Don't let other countries unfairly tax America's most innovative companies MORE is. I don’t know who that is right now," Schumer said.