because they are riding on the fact that only 39% of the population think its a good idea, their constituancy wants it dead and they know they wont get re-elected if it is allowed to go through unmolested. The other thing is that in the last CR they only asked that it be delayed a year like Obama has through fiat for the employer mandate and exemptions for the unions.
They promised to try to defund it, they've done that, they have decided to hold the line at delay, that will get them re-elected because even though the liberal media will spin this as the greatest travesty in our nations history, if the Republicans have the Cajones to hold them on this point for a couple of months then the public will be able to see that all the doom and gloom that the media is spinning is bull and finally hold the Senate responsible
They promised to try to defund it, they've done that, they have decided to hold the line at delay, that will get them re-elected because even though the liberal media will spin this as the greatest travesty in our nations history, if the Republicans have the Cajones to hold them on this point for a couple of months then the public will be able to see that all the doom and gloom that the media is spinning is bull and finally hold the Senate responsible