Published: Apr 22, 2014 5:18 PM EDT
Updated: Apr 22, 2014 5:55 PM EDT

FORT MYERS, Fla. - Tuesday's special primary election has drawn considerable interest among Republican voters.   The race to fill the congressional seat left vacant by Trey Radel has brought four Republican challengers, each vying for the opportunity to advance to this summer's general election against two other candidates - a Democrat and a Libertarian.

But not everybody who showed up to vote was eligible to cast a ballot Tuesday.  Radel represented Florida's 19th District, which includes most - but not all - of Lee County, and coastal portions of Collier County.

In places like North Fort Myers, living east or west of US 41 can determine your ability to vote.

Harry Long and his wife were among those who were surprised to learn they were ineligible.

"They said we don't live in this district," Long told WINK News after being turned away from a polling location off Herron Road.  "We live in District 17, or some other number."

"I may a dry run here for no reason," he said.

Officials with the Lee County Supervisor of Elections say they are ready to help answer voter questions, including where to vote and how to know if you are eligible.  The number to call is (239) 533-8683.

As of 5:00 Tuesday afternoon, more than 40,000 votes had been cast in Lee County alone.  More than 30,000 were by mail-in ballot. 

In Collier County, nearly 20,000 votes had been cast by 5:00, roughly half by mail.