(Times Free Press) - On Feb. 28, U.S. Sen. Bob Corker's campaign spent $14,115 on event invitations and envelopes.

Seven months later, Corker's three registered 2012 challengers filed campaign finance documents. The grand total among Larry Crim, James Durkan and Zach Poskevich: $11,569.

The comparison illustrates the distance between three under-the-radar hopefuls and Corker, a man who claims more campaign money than seven presidential candidates, including Herman Cain and Ron Paul.

Over the last three months, Corker has raised $1.2 million in campaign donations, swelling his balance to more than $6.5 million, finance records show.

Read more about this story from our news partners at the Chattanooga Times Free Press.