Trump refuses to release his personal tax returns.

Every presidential nominee from both parties has done it for the past four decades, and there are loud calls from pundits and even Republican leaders such as House Speaker Paul Ryan for Trump to release them.

Now his supporters are joining the chorus.

"I don't know what the hold-up is," said Wayne Kemp, a retiree and Trump supporter in Orlando, Florida.

CNNMoney spoke with almost 70 voters in the key swing states of Ohio and Florida in recent days for a "Your money, Your vote" special airing on CNN on October 15. Trump is virtually tied with rival Hillary Clinton in polls in these states. Over and over again, voters solidly backing Trump or leaning toward him said they think Trump should release his tax returns.