And breaking them an unthinkably long process requires unlikely allies.
When the vets are threatened with expulsion from their camp on Lexington Green, they find unlikely allies in townspeople who argue for permission for them to stay there overnight.
In 2011, when the Obama Administration sought to raise average fuel economy standards for cars and trucks to 54.5 miles per gallon by 2025, it found unlikely allies in Detroit.
And in 2011, Gingrich joined Grover Norquist and other unlikely allies - including Mike Jiminez, the president of California's prison guard union -- to endorse the NAACP's report, Misplaced Priorities: Over Incarcerate, Under Educate.
In 1990, the year Ryan passed away, two great friends and unlikely political allies, Ted Kennedy and Orrin Hatch, came together and introduced the Comprehensive AIDS Resources Emergency Act -- the CARE Act -- which was later named after Ryan.
Given the crucial role India and Pakistan play in American strategy, experts say it's unlikely that Washington will punish its allies politically or financially for dealing with Iran.
Allies believe that it is unlikely and would be much more complicated to have military action against North Korea or Iran.
But this seems unlikely, not least because some of his staunchest allies include wealthy black capitalists, who would resist such a move.
His differences with important potential allies in the Panamenista Party make an alliance unlikely.
While they have counted between 40 and 50 likely Democratic allies, White House aides concede they are unlikely to rally a full 70.
However, there is a growing realisation in the US and UK that allies such as Germany, France and Italy are unlikely to offer significant numbers of extra combat forces, or change the nature of their missions, says the BBC's Caroline Wyatt in Krakow.
If the West doesn't understand its policy, then it is unlikely to understand the significance of a challenge to that policy by Khartoum and its allies.
Likewise, Iran is unlikely to block the strait for long because it is no match for the U.S. Navy and its allies patrolling the Persian Gulf.
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