In Washington, well-known civil rights attorney, Ralph Neas, noted that US federal law prohibits targeting challenges to voters, even if there is a basis for the challenge, if race is a factor in targeting the voters.
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And there is one other factor that makes an Obama challenge from Hillary much more than idle speculation: former President Bill Clinton.
That's when the world's second-largest personal computer manufacturer, Dell, out to challenge Apple's "cool" factor, announced it was dropping its 800 ad agencies for one contract with WPP.
In the long run, the limiting factor will not be cost, but rather the challenge of integrating an intermittent solar resource into the power grid.
Things can only improve from now on and it can only be done without the factor of television money, that itself is the challenge and starts with honesty and living within your means.
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With an understanding based only on correlation and not causality, we challenge mix modelers to rationally explain where their long-term factor comes from (whatever value it is) and by what mechanism or how it becomes actual, longer-term consumer purchases.
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The challenge for London was, "What's going to be the 'wow factor, '" said Michael Payne, the former marketing director of the International Olympic Committee and chairman of the international division of Crystal CG, a Beijing-based company that made the people-pixel graphics.
Mr Mustow claimed that flood defences repaid their investment by a factor of 8-1 but admitted that continuing to invest would be a "challenge", after government cuts to planned projects.
This is a vast challenge, and it is worth bearing in mind that mankind's contribution to warming is the only factor that can be controlled.
That's when the world's second-largest personal computer manufacturer, Dell, out to challenge Apple (nasdaq: AAPL - news - people )'s "cool" factor, announced it was dropping its 800 ad agencies for one contract with WPP.
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