The people behind a new poll in Pennsylvania's U.S. Senate race said their latest survey shows Democrat John Fetterman's post-stroke debate performance last week is having a minimal impact on voters.

Fetterman used a closed captioning device to help him follow the conversation during the debate with Republican nominee Mehmet Oz in Harrisburg last Tuesday.

It comes after Fetterman suffered a stroke in May.

A new poll by Monmouth University afterwards shows Fetterman leading Oz by four percentage points. The pollsters concluded any questions about Fetterman's health have had a "minimal" impact among voters.

Another new post-debate poll has Oz and Fetterman tied heading into next Tuesday's election.