A surge in support for Republican White House hopeful Newt Gingrich has made him the new front-runner in Iowa, which holds the first of next year's U.S. presidential nominating contests, according to a closely watched opinion poll published Saturday. Gingrich, a former speaker of the U.S. House of Representatives, has support from 25 percent of likely Republican caucus-goers, up from just 7 percent in late October, the poll conducted for The Des Moines Register newspaper found. --- Texas Representative Ron Paul and Romney finished second and third, with support at 18 percent and 16 percent, respectively. Support for Minnesota Representative...