This is interesting:

Emerging from a 30-minute closed-door meeting in his office, Specter said Kagan was “forthcoming” during their talk, saying she sided with him on several issues, most notably her concern about the Supreme Court’s decision this year in Citizen United v. the Federal Election Commission that opened the door to increased corporate and union spending in federal elections.
Asked if their talk made him more comfortable with her nomination, Specter said, “It did.”
“When you talk about Citizens United… She said there wasn’t sufficient deference to Congress, something I feel very, very strongly about.”

More at The Hill.
I’m not sure how this squares with the SG Kagan’s 1996 piece mentioning Austin which we’ve been writing about, and her concern that some campaign finance measures have an improper incumbency protection purpose. CCP, of course, is not happy with the latest characterization.