WASHINGTON – The Senate's senior Democrat and Republican reached agreement Thursday to impose modest limits on the filibuster, the delaying tactics that minority parties have long used to kill legislation.

The deal would reduce — but not eliminate — the number of times opponents can use filibusters and also limit the time spent debating some bills and nominations. Senate Majority Leader Harry Reid, D-Nev., and Minority Leader Mitch McConnell, R-Ky., described the pact to rank-and-file lawmakers Thursday, and the Senate seemed likely to approve the restrictions later in the day.

The pact does not represent a dramatic reworking of Senate rules and leaves the minority party with far more power than it has in the House, where procedures allow a united majority party to muscle through its priorities.