Why is Leonard Boswell Afraid to Debate Ed Fallon?

The Fallon campaign sent out this press release yesterday...

Fallon has received invitations to eight debates and has accepted them all. “Unfortunately,” Fallon said, “Boswell has declined debate invitations from WHO Radio, the League of Women Voters, and Women for a Stronger America. Some of these groups have issued multiple invitations since February and have yet to receive any response from the Boswell campaign.”

Is it because Boswell can't defend his vote for the Iraq War?

Is it because Boswell can't defend his vote in favor of repealing the estate tax?

Is it because Boswell can't defend his vote to the bankruptcy bill?

Is it because Boswell can't defend his vote to approve torture in the Military Commissions Act?

Is it because Boswell can't defend his vote for No Child Left Behind?

Is it because Boswell can't defend his continued support for NAFTA-like trade agreements?

Is it because Boswell can't defend the fact that 74% of his donations come from PAC's?

Is it because Boswell can't defend his vote to provide $14 billion in tax breaks and incentives for oil and gas companies?