Culminating months of behind-the-scenes negotiations, a Philadelphia federal judge will soon be nominated for a seat on the 3rd U.S. Circuit Court of Appeals and will be replaced on the district court by a former lawyer for Sen. Arlen Specter, sources say.

In interviews, lawyers close to the nomination process said Specter had been lobbying for Reed Smith partner Carolyn Short to get the only remaining vacancy on the 3rd Circuit.