Actually, Times Square's storied light-show legacy depended on one man: Thomas Edison's engineer William J. Hammer was one of the first experts in electrical distribution systems and built the first large electric sign, illuminated at the 1882 Crystal Palace Exposition in London.
But that legacy depends on the continuity of his course and team, and so on stopping Mr Ivanishvili.
He may believe it is impossible to work with congressional Republicans, but his legacy depends on him trying.
His legacy depends on the big stuff: reducing crime, paying for public-employee pensions and somehow improving schools while showing a little heart.
The ultimate success of the law, and in turn his domestic legacy, depends on how well the insurance marketplaces operate, and whether enough young Americans enroll for coverage.
But his broader agenda, and his legacy, depend on the survival of Democrats in the Congress, and some of them could be vulnerable to criticism from gun owners in the next election.
Now that the deadline for the negotiations has passed, Obama should ignore the rhetoric that his legacy depends on an agreement and be prepared to reject a bad deal.
His legacy depends on it.
It makes sense and it should work, the President's legacy depends on it.
At this point, the President Obama knows that his climate legacy depends on rejecting Keystone XL.
