Paul slams Rubio's visa waiver vote, saying rival prefers 'open borders'
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Sen. Rand PaulRandal (Rand) Howard PaulSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Lawmakers grapple with warrantless wiretapping program MORE (R-Ky.) slammed Sen. Marco RubioMarco Antonio RubioOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Trump bets base will stick with him on immigration MORE Friday, suggesting that the Florida Republican's opposition to a proposal cracking down on visas is the latest example of where he's wrong on national security.

"The first job of the President should be to secure our borders and fix broken refugee and visa systems to stop terrorists," Paul, a GOP presidential candidate, said during a string of tweets aimed at the Florida Republican, also a 2016 candidate. "Yesterday I introduced my SECURE bill as an amendment in the Senate, to protect our borders and resources. Marco Rubio voted no."
 
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The Kentucky Republican tried to attach a proposal that would pause visas for almost 40 countries to the ObamaCare repeal bill passed by the Senate on Thursday evening. The proposal would also require individuals who are from Visa Waiver Program countries to wait 30 days before entering the country.
 
 
Even if the amendment had been added to the legislation, it stood little chance of becoming law with President Obama expected to veto the repeal legislation. 
 
Paul, however, suggested on Friday that Rubio's "no" vote was the latest example of where he believes the Florida Republican — dating back to his time in the state legislature — has been wrong on national security issues. 
 
 
The tweets aren't the first time the two senators have clashed on foreign policy issues, where Paul's libertarian views frequently put him at odds with Rubio's hawkish stances. 
 
The two have repeatedly traded barbs over a myriad of national security topics including government surveillance — where they were on opposite sides during a Senate debate earlier this year, how to confront Russian President Vladimir Putin and if a no-fly zone is needed in Syria. 
 
The Kentucky Republican stepped up the rhetorical battle earlier this week when he suggested that Rubio's foreign policy stances are similar to former Secretary of State Hillary ClintonHillary Diane Rodham ClintonBiden slams Trump over golf gif hitting Clinton Overnight Cybersecurity: Equifax hit by earlier hack | What to know about Kaspersky controversy | Officials review EU-US privacy pact Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain MORE, who is the front-runner for the Democratic presidential nomination. 
 
Contrasting himself with the "Clinton/Rubio foreign policy," Paul wrote in a Time magazine op-ed, "I hope voters will seek out a leader who will learn from history and not pursue a reckless policy."