I simply speculate that he would not have supported Feinstein's bill, as it was written, to the same extent that Obama pushed it daily, and was upset when it failed to gain enough Democrat votes to pass through the Senate.
The reason that it does not matter is because Romney is not the President, and Obama is the President. We have to work with what we have.
"Racing is life. Anything before or after is just waiting." - Steve McQueen