Donald Trump remains on top of the polls among Republican presidential candidates, but the gap between the former president and his onetime political protégé could be narrowing following the first GOP debate. A new poll from Public Opinion Strategies — a polling firm working for the DeSantis' campaign — shows Florida Gov. Ron DeSantis closing in on Trump among Iowa voters. The poll, obtained by Fox News Digital, interviewed 400 Iowa likely GOP caucus-goers and included a ballot test that saw DeSantis rise from 14% support up to 21% post-debate. Trump slid by one percentage point, from 42% to 41%....