12 things to know about Marco Rubio

Sen. Marco Rubio, R-Fla., today is expected to become the third big-name Republican to enter the 2016 race for the White House.

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Florida’s junior senator faces plenty of challenges during the Republican presidential primary, particularly explaining his past immigration reform advocacy to skeptical conservatives and thriving in a hyper-competitive candidate field that will almost assuredly feature an even better-known Floridian in former Gov. Jeb Bush.

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But Rubio is young, aggressive — he’s written a best-selling book and taught a college course while serving in the U.S. Senate — and enjoys the support of some decidedly wealthy political patrons.

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Here's more about the financial history of a man who could become the nation’s first Latino president:

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This story is part of Primary Source. Primary Source keeps you up-to-date on developments in the post-Citizens United world of money in politics. Click here to read more stories in this blog.

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Copyright 2014 The Center for Public Integrity. This story was published by The Center for Public Integrity, a nonprofit, nonpartisan investigative news organization in Washington, D.C.