Yesterday, Congressman Fred Upton (R-MI) endorsed Mitt Romney for President, just ahead of the Michigan Republican primary. The announcement — which can be found here on the Romney website — omits an important, yet behind the scenes detail.

The morning of the announcement, Ben Ginsberg, an attorney with the mega-lobbying firm Patton Boggs hosted a fundraiser for Upton. Ginsberg is Romney’s campaign lawyer.

“In order to enact the change we are fighting for in Washington, we must change the Administration,” said Upton in his endorsement statement. The change Upton was fighting for, at least during his fundraiser, cost $500 per individual to attend.

Click more to view a copy of the fundraising invitation: