The Democratic Party
Matt Finkelstein: Rep. Boehner Embraces Extremism: "No Difference" Between GOP And Tea Party
Obama's agenda may not add up - Los Angeles Times
First Read - Obama agenda: Turning to health care
A New New Deal - Obama's Agenda: Get America Back on Track - TIME
and here are some that used the term when Bush was president....
CNN.com - Homeland security tops Bush agenda - Nov. 8, 2002
Bush agenda faces some GOP resistance - The Boston Globe
Amazon.com: The Bush Agenda: Invading the World, One Economy at a Time (9780060878788): Antonia Juhasz: Books
Bush agenda faces uphill climb in lame-duck Congress - USATODAY.com
So keep arguing all you want. It's a common term used by both sides. You have no legs to stand on with this one.