Republican House Speaker John Boehner
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House Speaker Boehner: 'Obama wants a blank cheque'

President Barack Obama and one of his main Republican opponents, John Boehner, have made live prime-time television broadcasts to set out their rival views on the US debt crisis.

The president blamed conservative House Republicans for not being able to reach a deal that would avoid an imminent default on US national debt.

Minutes later in a rebuttal address, the house speaker accused President Obama of wanting a "blank cheque" and insisted the US government's "spending binge" was over.