An AARP poll released Wednesday indicates Pennsylvania's Senate race is tightening as Election Day approaches.

Republican Dr. Mehmet Oz is trailing Democratic candidate Lt. Gov. John Fetterman 48% to 46%, which is within the margin of error of 4.4 percentage points, the poll of likely voters found.

OZ, FETTERMAN SHOWDOWN HAS TAKEN CENTER-STAGE IN MIDTERMS BATTLE: HERE IS WHAT PENNSYLVANIA VOTERS HAD TO SAY

Republican Pennsylvania Senate candidate Mehmet Oz

Pennsylvania U.S. Senate candidate Dr. Mehmet Oz speaks during a Republican leadership forum at Newtown Athletic Club on May 11, 2022, in Newtown, Pennsylvania.  (Michael M. Santiago/Getty Images)

Approximately 4% of respondents were undecided, and approximately 2% were planning to vote for a third party. The poll was run by Republican-aligned firm Fabrizio Ward and Democratic company Impact Research.

FETTERMAN SAID DEBATES ARE ‘IMPORTANT PART’ OF DEMOCRATIC PRIMARY

The race in Pennsylvania to succeed retiring Republican Sen. Pat Toomey is one of a handful across the country that will likely determine if the GOP wins back the Senate majority in next month's midterm elections.

John Fetterman midterm elections

John Fetterman, lieutenant governor of Pennsylvania and Democratic senate candidate, speaks during a campaign rally in Pittsburgh, Saturday, Oct. 1, 2022. (Nate Smallwood/Bloomberg via Getty Images )

The Pennsylvania Senate race has grown tense and nasty at times with both campaigns running harshly critical ads of one another. 

However, the political rivals have yet to face each other on stage for a debate.

Fetterman committed to a televised debate with Oz later this month — the first and last debate between the two before the November election.

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PA Senate candidates John Fetterman and Dr. Oz

Pennsylvania Senate Democratic nominee John Fetterman and Pennsylvania Senate GOP nominee Dr. Mehmet Oz. (Mark Makela, Hannah Beier/Bloomberg via Getty Images)

The debate will be hosted by Nexstar Television in Harrisburg, Pennsylvania, and is scheduled to take place Oct. 25, two weeks before election day Nov. 8. 

The debate will be broadcast throughout Pennsylvania and featured live on local network affiliates that cover Pennsylvania's 67 counties.

Fox News' Kyle Morris contributed to this report.