President Obama agreed to sign a bill giving Congress a role in any agreement with Iran, but only after the bill was weakened.
http://thehill.com/homenews/administration/238868-president-relents-on-i...
The Conservative Caucus is a public policy organization, contributions to which are not tax deductible. The IRS has determined TCC to be a 501(c)(4) organization, exempt from Federal income tax. TCC can receive corporate donations.