Florida poll: 28 percent of GOP early voters picked Clinton
© Greg Nash

More than a quarter of Republicans who have already voted in Florida cast their ballots for Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonBiden flexes presidential muscle on campaign trail with Virginia's McAuliffe Shontel Brown gaining ground against Nina Turner in Ohio: poll Biden hits trail for McAuliffe in test of his political brand MORE, according to a new poll. 

A TargetSmart/William & Mary poll released Tuesday showed 28 percent of early Florida voters picked Clinton over GOP nominee Donald TrumpDonald TrumpTrump hails Arizona Senate for audit at Phoenix rally, slams governor Arkansas governor says it's 'disappointing' vaccinations have become 'political' Watch live: Trump attends rally in Phoenix MORE. The poll, which will be released in full Wednesday, was shared early with MSNBC. 

The poll also showed Clinton ahead of Trump overall, 48 to 40 percent, with a larger lead, 55 to 37 percent, among those who said they already voted. 

In the Florida Senate race, the poll showed incumbent GOP Marco RubioMarco Antonio RubioBipartisan congressional commission urges IOC to postpone, relocate Beijing Games Hillicon Valley: Democrats introduce bill to hold platforms accountable for misinformation during health crises | Website outages hit Olympics, Amazon and major banks Senators introduce bipartisan bill to secure critical groups against hackers MORE ahead of Rep. Patrick Murphy by 6 points, 49 to 43 percent. 

The poll surveyed 718 people, 311 who said they voted early, through web and phone interviews.