Two ends of the spectrum, quiet and dignified versus boisterous and commanding…..

Retired neurosurgeon Ben Carson has emerged as a leading Republican presidential candidate in Iowa and is closing in on frontrunner Donald Trump in the state that hosts the first 2016 nomination balloting contest.

The latest Bloomberg Politics/Des Moines Register Iowa Poll shows billionaire Trump with the support of 23 percent of likely Republican caucus participants, followed by Carson at 18 percent. When first and second choices are combined, Carson is tied with Trump.

Trump finds himself in a vastly better position than when the previous Iowa Poll was taken. He has become a credible presidential candidate to many likely Republican caucus-goers. The real estate mogul is rated favorably by 61 percent and unfavorably by 35 percent, an almost complete reversal since the Iowa Poll in May. He finds his highest ratings among those planning to attend the caucuses for the first time (69 percent) and limited-government Tea Party activists (73 percent). Just 29 percent say they could never vote for him, a number cut in half since May.