So presumably the Republicans would vote down an extension of the Bush tax cuts for the bottom 98%. We don't know because they won't put it to a vote. Could th

So presumably the Republicans would vote down an extension of the Bush tax cuts for the bottom 98%. We don't know because they won't put it to a vote. Could the Democrats then put to a vote an extension for the bottom 99%? Then 99.5%, 99.9% and so on? Eventually they would have to reach some threshold where the Republicans would have to compromise right? Is it a practical matter of time, a matter of the lost tax revenue or just the risk of alienating rich donors that prevents this?