So he is open to new ideas, but he will not accept a proposal that has some vague promise of revenues produced from closing loopholes and limiting deductions from the wealthy that is coupled with very concrete burdens placed on the middle class and seniors.

WHITEHOUSE: The White House

He had a vision of doing all of his class work digitally, a vision that became concrete once he acquired his first iPhone.

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And what about a clear, concrete vision for returning prosperity to working- and middle-class America?

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The smart concrete homes of Salvapan, with swings in neat gardens, are a class above the clapboard houses in the creole south side of Belize City.

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Yesterday I talked about a concrete, specific plan to create jobs -- to create more security for the middle class.

WHITEHOUSE: Remarks by the President at Ohio University, Athens, OH