If registered Iowa voters are any indication, President Bush is in a solid postion to be re-elected. His closest democratic challenger right now is Missouri's Dick Gephardt. Our exclusive Survey USA poll shows Mister Bush beating Gephardt 52 percent to 45 percent in Iowa. As for other top democrats, Wesley Clark trails President Bush right now, 59 to 35 percent. Howard Dean versus Mister Bush results in 54 percent of registered Iowa voters supporting the president and 42 percent support for Dean. Democrat John Kerry also loses by 12 percent right now in Iowa against the President. And former vice...