http://www.cbsnews.com/8301-18560_162-57327816/the-pledge-grover-norquists-hold-on-the-gop/
Please research this issue. Google Grover Norquist thoroughly.
To make illegal or create a Constitutional Amendment, consider the following:
No President, Congressman, or any other elected or appointed government official shall sign any pledge, take any oath, or make any commitment of any kind to any person, party or entity, in regards to their call of employment and duties thereof, save those prescribed by that of the Government of The United States of America.