The labor consortium American Rights at Work (ARAW) called business groups opposed to the Employee Free Choice Act (EFCA) "two-faced" on the legislation's arbitration provision.

In an ad running in today's Capitol Hill newspapers, including The Hill, ARAW asserts that business are willing to engage arbitration when it suits their interests, but not when it benefits labor groups.

"Labor law reform must ensure that workers who want to join a union are able to do so without facing endless delays from corporations seeking to deny them a voice in the workplace," ARAW spokesman Josh Goldstein said. "Big Business' position is hypocritical and motivated by their desire to maintain a status quo in which corporations make millions while middle class families struggle to get ahead."

In particular, the ad takes aim at the U.S. Chamber of Commerce, a principal opponent of EFCA. View the ad below: