Poll: 40 percent of S.C. GOP voters favor Donald Trump for president

Donald Trump's popularity among S.C. Republican voters has reached its highest point so far, according to a new poll.

Forty-percent of likely S.C. GOP primary voters said they most likely would vote for Trump in the state's Feb. 20 GOP presidential primary, according to the CBS/YouGov poll.

The survey interviewed 818 likely S.C. GOP primary voters from Oct. 15-22. The margin of error is plus or minus 5.3 percentage points.

Retired neurosurgeon Ben Carson also continued to tick up in popularity in the state’s first-in-the-South primary. Carson was the first pick for 23 percent of poll respondents.

Trump and Carson also hold first and second place, respectively, in national polls.

According to the CBS/YouGov poll, Trump has a wider lead over Carson in New Hampshire. There, the New York billionaire real-estate mogul leads Carson 38-12.

In Iowa, however, Trump and Carson are in a dead heat, both polling at 27 percent.