For the second time this week a statewide poll shows next year’s potential contest for the U.S. Senate between current Democratic Sen. Bill Nelson and Republican Gov. Rick Scott is a dead heat.

A poll released by Mason-Dixon Research and Strategy shows both Nelson and Scott tied with each receiving support from 44 percent of the registered voters surveyed. Twelve percent were undecided.

Earlier this week, a poll released by the University of North Florida’s Public Opinion Research Lab showed Nelson and Scott in a statistical tie with Nelson holding a slim 37-36 percent lead.

Scott, who hasn’t officially announced he will run for the Senate but is considered to be a likely candidate, appears to have received a post-Hurricane Irma bump in the Mason-Dixon poll. Earlier this year, the survey showed him trailing Nelson by four percentage points, 45-41 percent.

A poll released Wednesday by Mason-Dixon showed a majority of voters surveyed approved of the way the governor handled the state’s response to Irma.

The shift in the recent results appears to reflect a swing in independent voters. Scott now leads among independents by a 44-40 percent margin, whereas Nelson held a 9 percent lead among independents in February.

The poll released Thursday by Mason-Dixon shows voters have a  favorable view of Scott, who holds a 44-38 percent lead over Nelson when it comes to approval ratings. But, Scott has a slightly higher unfavorable rating, 33-32 percent.

The same holds true for job approval. More people approve of the job Scott has done, 53-50 percent. But he also has a higher disapproval rating than Nelson, 40-35 percent.

The Mason-Dixon poll surveyed 625 registered voters by phone from Oct. 17-19. The poll has an error margin of plus-or-minus 4 percentage points.