Senate Majority Leader Harry Reid says Democrats won't support a proposal that would have ended the partial shutdown of the Federal Aviation Administration.
At LaGuardia Airport, that means the demolition of an old air traffic control tower will be delayed until at least September, when Congress reconvenes.
A $100 million project to install security bollards is also on hold. Air traffic controllers remain on the job, but most of their support staff has been laid off.
The shutdown began 11 days ago and has caused the furlough of 4,000 FAA employees and lay-offs for 70,000 construction workers nationwide.
Reid said Democrats can't support a bill introduced by House Republicans that would grant the FAA a temporary extension while cutting $13 million worth of subsidies to small airports.