Ted Cruz is further cementing his spot in the top tier of the Republican presidential field after doubling his support among GOP voters since October, according to a new poll. Donald Trump maintains a steady lead over the Texas senator and the rest of his opponents.

The latest Public Policy Polling survey released Thursday shows Cruz at 14 percent support among the GOP electorate, putting him in fourth place behind Trump (26 percent), retired neurosurgeon Ben Carson (19 percent) and Florida Sen. Marco Rubio (13 percent). Cruz, who ranks second in the Washington Examiner's presidential power rankings, stood at 7 percent when PPP surveyed Republican voters in early October.

Together, the four leading Republican candidates are dominating their party's presidential field. Of the 11 remaining GOP hopefuls, six are polling at or below 2 percent nationally. Only former Florida Gov. Jeb Bush reached 5 percent, with former Arkansas Gov. Mike Huckabee and businesswoman Carly Fiorina just behind him at 4 percent each.

Second-place Carson remains the most-liked candidate among GOP voters, but his favorability ratings have sharply declined since October. The soft-spoken doctor has seen an 10-point drop in the number of voters who view him favorably in just one month, though he maintains a net positive rating of 61-24 percent.

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