Republican presidential contender Ron Paul, largely dismissed both by the mainstream media and many in the general population, nonetheless has the endorsement of an invigorated core of supporters who may propel him to victory in the Iowa caucuses. The depth of that backing, and his own organizational strength, was on display yesterday during a stop at the Iowa Speedway outside Des Moines. A crowd braved a winter chill, and post-holiday diversions, to hear the Texas congressman deliver a libertarian tour de force.