1. If the republicans get a majority of the senate, they can eliminate the filibuster.
When the democrats filibustered some of bush's judicial appointments, they threatened to eliminate it. The democrats will never have the opportunity to block any and all legislation from passing through the senate if they are in the minority.
... the horrific struggle to establish a human self results in a self whose humanity is inseparable from that horrific struggle. - David Foster Wallace