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			 Advisers say a key part of the Cuban-American's election strategy 
			for 2016 will be a "peace-through-strength" global view based on 
			increased defense spending. 
			 
			To highlight his foreign affairs credentials, Rubio, 43, a 
			first-term senator from Florida, will announce his bid for the 
			Republican nomination with a speech at Miami's Freedom Tower, where 
			thousands of Cuban exiles fleeing the communist-run island in the 
			1960s were first registered by U.S. authorities. 
			 
			His support registers in single digits in opinion polls on likely 
			Republican contenders, but aides believe Rubio, who was on 2012 
			nominee Mitt Romney's short list for vice president, will rise when 
			voters take a closer look at him. 
			 
			Rubio's attempt to capture the campaign spotlight came as Hillary 
			Clinton declared her candidacy on Sunday for the Democratic 
			presidential nomination in a video announcement that grabbed 
			worldwide media attention. 
			
			  Clinton, a former secretary of state, will hit the campaign trail in 
			Iowa on Tuesday and Wednesday. Iowa holds the kickoff contest in the 
			parties' presidential nominating process early next year. 
			 
			Rubio, a member of the Senate Foreign Affairs and Intelligence 
			committees, is expected to lay out a vision of American leadership 
			in a world menaced by Islamist extremism and authoritarian 
			governments from Russia to China and Iran. 
			 
			On domestic policy, he backs the classic Republican remedies of 
			small government and low taxes, and an end to President Barack 
			Obama's healthcare law. 
			 
			Rubio takes some of his foreign policy advice from a group of 
			neo-conservatives linked to the administration of former President 
			George W. Bush. One senior aide, Jamie Fly, argued in a 2012 
			magazine article for "regime change" in Iran, bringing back memories 
			of the U.S. invasion of Iraq in 2003. 
			 
			GROWING REPUBLICAN FIELD 
			 
			Rubio becomes the third major Republican figure to announce his 
			candidacy, after Senator Ted Cruz of Texas, another Cuban-American, 
			and Senator Rand Paul of Kentucky. The Republican field is expected 
			to grow considerably, likely including former Florida Governor Jeb 
			Bush, a one-time mentor to Rubio, who will rival him for votes and 
			donor money in primary states. 
			 
			
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			Rubio's national security stance could attract primary voters in key 
			conservative states such as South Carolina, one of the early voting 
			states in the primary season. Conservatives are wary, however, of 
			his prominent role in drafting a broad immigration bill in 2013, 
			although he has since backed off a comprehensive reform effort. 
			 
			With Clinton the early favorite to be the Democratic nominee, the 
			eventual winner of the Republican race needs to be sharp on world 
			affairs. 
			 
			Reversing recent "sequestration" spending cuts on the U.S. military 
			is a main component of Rubio's foreign policy. One of Rubio's top 
			outside advisers on defense spending, Eric Edelman, was a senior 
			Pentagon official and aide to Vice President Dick Cheney. He says he 
			regularly briefs the senator. 
			 
			"It's mostly about defense, but I've talked to him about the 
			authorization of military force. I've talked to him about the 
			campaign against ISIS, about Russia and Ukraine. There's not a 
			shortage of issues right now," Edelman said. 
			 
			Rubio is critical of Obama's diplomatic opening to Cuba and strongly 
			opposes Venezuelan President Nicolas Maduro's government, which he 
			has described as made up of "thugs." 
			 
			Elliott Abrams, who also has advised Rubio, said the freshman 
			senator's Cuban background - his parents came to the United States 
			in the 1950s - made him more sensitive to issues of freedom abroad. 
			
			  
			 
			 
			"The whole question of the expansion of freedom of democracy is of 
			greater interest to him as a foreign policy theme than it is for 
			many other people," said Abrams, a former senior diplomat who served 
			the George W. Bush and Ronald Reagan presidencies. 
			 
			(Editing by John Whitesides, Leslie Adler and Andre Grenon) 
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