WASHINGTON — Even though it was backed by all three major presidential candidates, senators from both parties killed a proposed one-year ban on lawmakers' home-state pet projects.

The 71-29 bipartisan vote against the earmark moratorium came as Congress pressed ahead with a budget plan that would raise taxes for millions of Americans in three years by allowing some of President Bush's tax cuts to die after he leaves office. Hawai'i Sens. Daniel Inouye and Daniel Akaka, both Democrats, opposed the earmark moratorium.

The House passed a $3 trillion federal budget plan that would provide increases to domestic programs but bring the government's ledger back into the black by letting all of Bush's tax cuts expire at the end of 2010 as scheduled.

The Senate endorsed extending $340 billion of Bush's tax cuts but balked continuing all of them.

All three major presidential candidates interrupted their campaigns to cast votes on the budget plan, which is nonbinding but highlights the choices on taxes and spending facing the next president and Congress. Binding votes on the expiring Bush tax cuts will be left to his successor and the Congress that's elected in November.

The practice of inserting "earmarked" spending into legislation is used by lawmakers in both parties.

Earmarks have exploded in number and cost in recent years, accompanied by charges of abuse over examples such as the proposed "bridge to nowhere" in Alaska, which would have cost more than $200 million to serve an island with a population of about 50.

"This may be the last bastion in American where they don't get it. Americans are sick and tired of the way we do business in Washington," presumptive Republican nominee John McCain said after the proposed moratorium was killed. "As president, I promise the American people ... the first earmarked, pork-barrel bill that comes across my desk, I'll veto it."

The five-year budget plan passed the House on a 212-207 vote, with Republicans unanimously opposing it because of what they said was $683 billion in tax increases. Hawai'i Reps. Neil Abercrombie and Mazie Hirono, both Democrats, voted for the measure.

In the Senate, McCain, R-Ariz., voted to extend the full roster of tax cuts. Seven years ago he opposed them as being tilted in favor of the wealthy.

Democratic rivals Hillary Rodham Clinton of New York and Barack Obama of Illinois both voted to extend some of Bush's tax cuts. But they joined other Democrats in a 52-47 vote against extending $376 billion of them.