Having given up on gaining Republican support, Democrats began trying to get members of their own party to agree on a healthcare bill they can pass.http://www.miamiherald.com/2010/02/27/1503040/democrats-lining-up-votes-in-own.html
The Washington Democratic leadership has decided to try to pass healthcare reform on a "go it only", one party basis with a simple majority vote.
You can ignore whether this is legal or fair. No one in Washington cares.
But, consider the politics. If the Democrats fail, they can't blame "Republican obstructionism". The fault will be theirs alone.