Marco Rubio

Florida Sen. Marco Rubio on Tuesday announced he will seek the 2016 GOP presidential nomination. AP Photo/Carolyn Kaster

By Jose A. DelReal
April 13 at 6:30 PM

Florida Sen. Marco Rubio’s announcement Monday that he will seek the 2016 GOP presidential nomination makes him the fourth major candidate to announce a White House bid in the last three weeks — and he could be the last big candidate to join the fray until late May.

Here’s what we know about several candidates’ timelines:

— Former Maryland governor Martin O’Malley (D) recently said that he will announce whether or not he is running for president — which he recently called a “colossal undertaking” — in late May. Recent comments indicate he is leaning toward running; at one point he subtly jabbed Clinton by saying “the presidency of the United States is not some crown to be passed between two families.”

— Retired neurosurgeon Ben Carson (R) in March launched a presidential exploratory committee and has indicated he is leaning toward running. If he does so, he has said he will announce his decision in May.

— Former Texas governor Rick Perry (R) has also indicated he will make up his mind in May. Likewise, former Arkansas governor Mike Huckabee (R) is slated to make an announcement sometime in the late spring.

— Wisconsin Governor Scott Walker (R) is now eyeing a June announcement, if he ultimately decides to run. (He has moved into the top-tier of candidates in recent months and his candidacy at this point is all but certain.)

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