EDISON - The election to replace the late U.S. Sen. Frank Lautenberg is just about one month away, and the candidates are still trying to secure votes.

In the past week, both the Cory Booker and Steve Lonegan campaigns released their recent tax returns.

Both earned more than a million dollars in the last two years. Booker earned his income in speaking fees and payouts from his previous job. Lonegan made his money from a business venture, some real estate and his wife's job as a teacher.

Neither return garnered any headlines, and experts say they don't make a difference to voters.

Big endorsements over the last few weeks also seem to have had little impact. This week, Booker added the environmental group the Sierra Club to his roster, while Lonegan will get a campaign visit from Tea Party libertarian and Kentucky Sen. Rand Paul.

Turnout is expected to be very low for the special election, to be held in October. Current polling has Booker with at least a 20-point lead.