CBS's final state poll has Biden, Sanders locked in tie ahead of Iowa caucuses

If you were disappointed in the cancellation of the CNN/Des Moines Register Iowa poll, have no fear.

CBS News on Sunday released its final poll in Iowa ahead of Monday's caucuses, and the top two candidates are in a dead heat. Former Vice President Joe Biden and Sen. Bernie Sanders (I-Vt.) both received 25 percent in the survey. Their shared lead is in line with predictions that Monday will produce a tightly contested result to open up primary voting.

Former South Bend, Indiana, Mayor Pete Buttigieg wasn't too far behind at 21 percent, while Sen. Elizabeth Warren (D-Mass.) finished fourth at 16 percent. It wasn't a great poll for Sen. Amy Klobuchar (D-Minn.), who only garnered 5 percent support, despite some other recent polls indicating she's got her fair share of backers in Iowa.

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The CBS News poll was conducted between January 22-31 among 1,835 registered voters in Iowa. The margin of error is ±3 percentage points.