"Newt is the smartest of the possible challengers and could best Obama in debate," said Virginia conservative activist Tom Martin, reflecting the opinion of many Republicans and independents who flock to events featuring Mr. Gingrich.
Gingrich to 'explore' run in 2012 →
He said it would create danger in having motorized rafts and nonmotorized rafts coming at one another in a stretch of the river that already is congested.
Hualapai shelves upriver trips in Grand Canyon →
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