WASHINGTON (AP) _ A six-year, $145 billion highway bill has died at the hands Democrats pushing for new campaign finance laws.

``In view of the other things we must do ... we're just out of time for the year,'' Senate Minority Leader Trent Lott for it, Lott, R-Miss., said Tuesday after losing the fourth attempt in two weeks to stop a Democratic filibuster of the bill.

Democrats blocked the highway bill in an attempt to pressure Republicans to agree to setting a date for full-fledged debate and action on revising campaign finance laws. All of the Senate's 45 Democrats support a campaign finance sponsored by Sens. John McCain, R-Ariz., and Russell Feingold, D-Wis.

Exempted from the Democratic filibuster are bills covering government spending in fiscal 1998, which began Oct. 1. The highway bill was targeted because it is a long-term authorization measure on road building projects.

Minority Leader Thomas Daschle, D-S.D., said Democrats would support a six-month highway bill, but Lott said he will not bring up such an interim measure.

While states had $12.6 billion in unobligated federal highway funds as of September, the lack of a long-term federal funding plan could disrupt planning and the letting of new multi-year contracts.

Assistant Majority Leader Don Nickles, R-Okla., said he believed most states have enough money in the pipeline to get through six months without an extension.