From MediaMatters.org:

As justification for altering party rules in the House of Representatives in order to allow Majority Leader Tom DeLay (R-TX) to retain his leadership position if indicted by a Texas grand jury on political corruption charges, Republicans have claimed that Travis County, Texas, District Attorney Ronnie Earle, who is investigating DeLay, is doing so for purely partisan reasons. This charge was dutifully echoed on FOX News Channel, and most other news outlets have reported it -- without noting that Earle has, in fact, prosecuted more Democratic politicians than Republican politicians.

While Earle is an elected Democrat, as Media Matters for America has previously noted, a June 17 editorial in the Houston Chronicle commended his work: "During his long tenure, Travis County District Attorney Ronnie Earle has prosecuted many more Democratic officials than Republicans. The record does not support allegations that Earle is prone to partisan witch hunts." This assertion supports Earle's own claim about his record; a March 6 article in the El Paso Times reported: "Earle says local prosecution is fundamental and points out that 11 of the 15 politicians he has prosecuted over the years were Democrats."