House Budget Committee chairman Paul RyanPaul RyanSenate heading for late night ahead of ObamaCare repeal showdown Demonstrators gather outside Capitol to protest GOP ObamaCare repeal Two GOP senators back ObamaCare repeal after Ryan call MORE (R-Wis.) supports Sen. Marco RubioMarco RubioMexican politicians have a new piñata: Donald Trump Bush ethics lawyer: Congress must tell Trump not to fire Mueller The private alternative to the National Flood Insurance Program  MORE's (R-Fla.) immigration reform blueprint.

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"Sen. Rubio is exactly right on the need to fix our broken immigration system," Ryan wrote on his Facebook on Monday. "I support the principles he’s outlined: modernization of our immigration laws; stronger security to curb illegal immigration; and respect for the rule of law in addressing the complex challenge of the undocumented population. Our future depends on an immigration system that works."

Ryan's endorsement gives a boost to Rubio's efforts. Both Republicans are seen as potential GOP candidates for president in 2016. 

Rubio outlined his preferred approach to immigration reform in a recent interview with The Wall Street Journal. He argued the best way to tackle immigration reform would be through passing a series of bills instead of a single omnibus package. 

Rubio also wants undocumented immigrants to come forward and go through a process to get legal status that could include background checks, paying a fine and back taxes and possibly community service. That process also includes the option of eventually becoming a citizen. 

Legislators in both the House and the Senate have begun quiet negotiations on immigration reform. Rep. Luis GutierrezLuis GutierrezImmigration activists fear for future of ‘Dreamers’ program House passes 'Kate's Law' and bill targeting sanctuary cities Judiciary Dem asks GOP chairman to invite Trump to testify in public MORE (D-Ill.) a leading Democrat on immigration reform, has held discussions with Ryan on the topic.