Just a fortnight ago, the president seemed almost impregnable, with a chance that he might be re-elected unopposed in May.
India enjoyed a perfect start to the day, advancing a solid overnight position of 311-5 to a virtually impregnable one of 422-5 soon after lunch.
As the legislation - seen as having been watered down compared to the initial White Paper in 1997 - made its way through parliament, Labour MP Mark Fisher described it as "an amazing defensive edifice for the government...a virtually impregnable fortress".
Certainly, given how poorly Mitt Romney has been doing at a time when the state of the economy should have handed him an impregnable lead, it is clear that the Republican party is going through a historic life crisis.
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It believes such a state, with the return of 1948 refugees, would have an impregnable and growing Arab, Muslim majority, and would spell the end of Israel as a Jewish state.
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By just bringing up the question of the suffering working class, and the predations of capitalism, Newt has set off a bomb in the previously-impregnable GOP salon.
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Its once impregnable popularity increasingly under pressure on other fronts, a long housing recession is the last thing it needs.
In Europe, insiders have permanent jobs with nigh-impregnable security, high wages, guaranteed pensions and a still generous welfare state that they know how to exploit.
It's not far-fetched to think that hundreds of millions of gallons of fuel a year and hundreds of lives could be saved by miniature, impregnable nuclear reactors that could be remote-detonated by satellite if they ever fell into enemy hands.
They feel executive mayors, voted into office for an impregnable five year term with powers to enforce policies which bypass the traditional council, are a bad idea.
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