Technically a bill originating in any branch can be approved and then sent to the other branch for debate, amendment and approval, followed by reconciliation if it now differs from the version originally approved.
I don't see why you couldn't have a situation where PIPA supporters lay low for a news cycle or two, then get PIPA approved and sent to the House when nobody is watching. PIPA is even more generically-worded than SOPA, so it will be more difficult to fight it on the basis that "it will break the internet".
There is clearly a lot of money riding on this bill, and it's election year.
I don't see why you couldn't have a situation where PIPA supporters lay low for a news cycle or two, then get PIPA approved and sent to the House when nobody is watching. PIPA is even more generically-worded than SOPA, so it will be more difficult to fight it on the basis that "it will break the internet".
There is clearly a lot of money riding on this bill, and it's election year.