Sen. Lamar Alexander (R-Tenn.) is sporting a wide lead over his Republican competition, according to a recent survey conducted for his campaign, the latest evidence the prospect of the senator falling in the primary is waning.

Sen. Lamar Alexander (R-Tenn.). (AP Photo/Mark Humphrey)

Alexander leads state Rep. Joe Carr (R) 62 percent to 17 percent in the poll conducted for his campaign by North Star Opinion Research and shared with Post Politics. Two other Republican candidates, Brenda Lenard and Danny Page, clock in at 2 percent and 1 percent, respectively. Eighteen percent of those likeliest to vote in the GOP primary said they were undecided.

The survey comes on the heels of another productive fundraising quarter for Alexander, who more than doubled Carr's haul and ended the year with a healthy $3.2 million in the bank.

The survey shows that most Republican voters (67 percent) hold a favorable opinion of Alexander, and very few (1.6 percent) haven't heard of him.

Alexander is one of six Senate Republicans facing a primary challengers or challengers this cycle.

The poll of 600 likely Republican primary voters was conducted from Feb. 3-6. It carries a margin of error of +/- 4 percent.