The sorry performance of ABC anchors Charles Gibson and George Stephanopoulos in this week’s final Democratic primary debate should serve as a signal of the coverage to come. Playing gotcha with Democrats and patty-cake with Republicans will remain basic operating procedure for the mainstream media this year, no different from the past half-dozen presidential campaigns -- except that the additional bias in favor of John McCain may make a bad situation worse.

And as Barack Obama should have learned during the debate’s first 45 minutes, if not before, the same fuzzy but obsessive focus on "character" that plagues Bill and Hillary Clinton will be turned on him with equal or greater ferocity by those who once claimed to admire him. He is now subject to the "Clinton rules," which have long permitted pundits, editorialists and reporters to indict the former president and first lady for sins that other politicians, mostly Republican, may commit with impunity (see Gingrich, Newt, first, second and especially third marriage).

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Why otherwise would the campaign press corps have demanded the Clinton tax returns while nobody insists that McCain release the returns filed by him and his beer heiress wife, Cindy? When the Arizona Republican releases his 2007 return, as he has done today, will anyone urge him to cough up returns from previous years, as the Clintons did? It is an act of transparency that he has neglected to fulfill for the past quarter-century of his public service, without a peep from his press fans (despite the precedent of his wife's highly questionable shopping-mall investment with savings and loan crook Charles Keating).

And having raked Bill Clinton's charitable foundation for evidence of conflicts of interest, when will the press corps take another look at McCain’s "Reform Institute," the nonprofit think tank that has served as a soft-money conduit and cushy sinecure for his political advisors?

Will anyone ask McCain why he doesn't wear an American flag pin, the burning question that the ABC anchors pressed on Obama? Perhaps the former POW deserves a pass on that issue, but it is interesting to note that photos of McCain with a flag pin are very scarce -- which may simply prove that not every patriot must constantly sport Old Glory on his lapel.

It would be refreshing to place the likes of Gibson and Stephanopoulos and their peers on the witness stand for a change to explain their choices and prejudices. Why did they require Democrats to make tax-cutting pledges that are based on bad economics and worse journalism? Why should they focus on Obama's tenuous connection with a reprehensible but inconsequential figure like former Weatherman Bill Ayers, when they have never mentioned the White House coddling of Cuban exile terrorists? Why do they obsess over the "bitter" gaffe by Obama while passing so lightly over the confusion of Sunni and Shia groups by McCain, supposed master of foreign policy?

Details may be different but the double standard remains the same. If the coverage of this election already induces a nauseating sense of déjà vu, be warned. It will only get worse.