Democrat Tom Harkin’s campaign is scoffing at the announcement that G-O-P Senate candidate Greg Ganske’s campaign may pursue its own lawsuit against Harkin if criminal charges aren’t filed in “tape-gate”. A man who was a Harkin aide in the mid-70s admitted he secretly taped a Ganske fundraiser, and officials are investigating. Republicans yesterday questioned whether Polk County Attorney John Sarcone, a democrat, should pass the case along to someone else because of a conflict of interest. John Frew, Harkin’s new campaign manager, says that’s ridiculous.Frew says Republicans are using “political pressure” to try to “influence justice.” Frew says the Ganske campaign should wait for the County Attorney to announce his decision about whether to press charges before talking about filing a lawsuit of their own.