One of the many benefits to traveling during election season is being spared the barrage of attack ads on the nation's airwaves. But there is no avoiding reading about the partisan charges and counter charges about who is spending how much money on these ads and where the money is coming from.  The DISCLOSE Act and Citizens United have been major topics on the road. The latest flap about the Chamber of Commerce seems to miss the key point that regardless of whether the Chamber collects dues from foreign-owned corporations, the Chamber is making the largest campaign expenditures in history while refusing to disclose its donors.