Carl Levin (wikipedia image) by Wikipedia
" The Levin-McCain approach could also have a surprising consequence: Instead of tipping the balance of power toward the majority, it will leave in place the silent filibuster, which requires 60 votes to override, but would allow amendments to be adopted by a simple majority vote.
The proposal guarantees the minority party the possibility of at least two amendments on every bill. If the amendments are germane to the bill, they would be subject to a simple majority vote after debate is closed. Because the vote to close debate has to occur before members of the majority know whether a controversial amendment will be added, they cannot use their cloture power to block the amendments.
For instance, consider a hypothetical situation in which Democrats bring a bill to the floor related to funding health care, and Republicans bring up an amendment to defund Planned Parenthood that a handful of conservative Democrats might vote to support. The majority Democrats would have to decide whether to kill the overall bill before the vote actually occurs on the amendment.
Shortly after the Levin-McCain proposal was released last week, a large coalition of progressive and labor organizations announced its opposition to the bill. Groups that spend more time on defense than on offense would have the most to lose from the Levin-McCain plan, opponents said."