From MSNBC.com:

And in case the nuclear option is employed, Strickland says, Specter has hired a committee staffer who’s well versed on the nuts and bolts of its execution. Dimple Gupta co-authored a Harvard law review article with Marty Gold (a former Frist parliamentary guru) which has been widely circulated among Senate Republicans as a go-to book for the what, why, and how of this complicated maneuver. Strickland suggests that Gupta’s hiring should temper some criticism from conservative groups who were unhappy when Specter earlier hired a Democrat and former NAACP lawyer. The committee source contends Gupta was not hired to appease the right, but says the former Justice Department official will work on nominations.