GOP Conspiracy against Obama?

IL. Gov Blagojevich has stated that Obama's opposition to him vetoing an ethics bill is a "very clever ruse by the McCain campaign and by the Republicans".

Why would he say something like that? Why would he oppose an ethics bill supported by the overwhelming majority of the Il Congress?

Blagojevich’s aggressive fundraising is the target of the original ethics bill, which was overwhelmingly supported by Democrats and Republicans alike in the state legislature. It would prohibit state contractors and those seeking state business worth $50,000 or more from donating to the official who doles out the work. The governor rewrote the bill to include a variety of side issues and critics charge Blagojevich’s move was an attempt to sabotage the original measure.

Oh, that's why.