"Senate Republicans are struggling to adapt to an altered political world when it comes to candidates for federal courts and senior Justice Department posts.

No longer able simply to defend choices made by a fellow Republican, as they did under President George W. Bush, Republicans on the Judiciary Committee have turned into vocal critics of many of President Obama's legal nominees. They complain that several are committed liberal ideologues, much in the way Democrats complained that Mr. Bush's choices were committed conservative ideologues.

But so far, facing a solid Democratic majority in the Senate, they have been able to do little beyond briefly delaying confirmation. Now they are weighing whether to use the filibuster — a threat of extended debate, the tool many Republican senators regularly denounced when it was used by Democrats to block some Republican nominees. These are certainly different times.

The current Republican focus is on a pair of nominees: Mr. Obama's first selection for a federal appeals court seat, David F. Hamilton, and his choice to head the Office of Legal Counsel at the Justice Department, Dawn Johnsen. (By coincidence, the two are in-laws.)

Senator Arlen Specter of Pennsylvania, the Judiciary Committee's ranking Republican, has complained that the Democrats are moving too quickly to consider Mr. Hamilton, a federal trial judge in Indiana since 1994. The committee has set for Wednesday the confirmation hearing on Judge Hamilton, who was nominated only in mid-March.

But the attacks on the nomination of Ms. Johnsen, who is married to Judge Hamilton's brother, have been more severe. Ms. Johnsen, a law professor at Indiana University, was an unsparing critic of memorandums, written by lawyers at the Office of Legal Counsel in the Bush administration, that said the president could largely ignore international treaties and Congress in fighting terrorists and that critics have portrayed as allowing torture in interrogation.

The broad reading of presidential authority was "outlandish," and the constitutional arguments were "shockingly flawed," Ms. Johnsen has written. While her language was harsh, the memos have largely been withdrawn, and among lawyers a consensus agreeing with her views has emerged.

Nonetheless, Republicans have denounced her comments. Senator John Cornyn of Texas, a member of the committee's minority, said Ms. Johnsen lacked the "requisite seriousness" to head the Office of Legal Counsel.

A committee Democrat, Senator Sheldon Whitehouse of Rhode Island, said he was astonished by the attacks. After the "long, dark days of degradation" of the office, Mr. Whitehouse said, it is hypocritical of Republicans who were then silent to complain now about partisanship.

"Now suddenly they come forward with concerns," he said. "Where were you when those incompetent, ideological opinions were being issued?" ..."

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Sounds like the trumpets of surrender are still ringing in the red-faced camp. Irrational partisan loyalty at the expense of reason has finally come home to roost.