WASHINGTON - Ben Carson has placed first in a recent national Republican presidential primary poll, pushing Donald Trump into second place for the first time since June. Carson, a retired neurosurgeon, received 26 percent of the support in the New York Times/ CBS News poll released on Tuesday morning. Trump placed second with 22 percent of the support of those surveyed, trailing by less than the 6 percentage-point margin of error. The poll of 575 Republican primary voters was conducted Oct. 21 through 25. The Republican candidates will meet on the debate stage on Wednesday night, providing a third opportunity for them to differentiate themselves.