On Tuesday, when this page runs the list of people it has endorsed for election, we will include no Republican Congressional candidates for the first time in our memory. Although Times editorials tend to agree with Democrats on national policy, we have proudly and consistently endorsed a long line of moderate Republicans, particularly for the House. Our only political loyalty is to making the two-party system as vital and responsible as possible.

That is why things are different this year.

To begin with, the Republican majority that has run the House — and for the most part, the Senate — during President Bush’s tenure has done a terrible job on the basics. Its tax-cutting-above-all-else has wrecked the budget, hobbled the middle class and endangered the long-term economy. It has refused to face up to global warming and done pathetically little about the country’s dependence on foreign oil.

Republican leaders, particularly in the House, have developed toxic symptoms of an overconfident majority that has been too long in power. They methodically shut the opposition — and even the more moderate members of their own party — out of any role in the legislative process. Their only mission seems to be self-perpetuation.

The current Republican majority managed to achieve that burned-out, brain-dead status in record time, and with a shocking disregard for the most minimal ethical standards. It was bad enough that a party that used to believe in fiscal austerity blew billions on pork-barrel projects. It is worse that many of the most expensive boondoggles were not even directed at their constituents, but at lobbyists who financed their campaigns and high-end lifestyles.