Nicaragua's opposition is pressing on with a bid to cancel disputed elections despite a presidential decree declaring that effort unconstitutional.

An alliance of opposition parties says President Daniel Ortega abused his power with a decree nullifying a legislative proposal to cancel the results of the Nov. 9 municipal elections.

Saturday's statement accused Ortega of "once again violating the constitution."

Liberal Constitutional Party spokesman Leonel Teller says the alliance will introduce the bill next week despite the decree.

The leftist Sandinistas won 105 of 146 races in the elections.

The opposition claims widespread fraud and wants a revision of the results in the presence of international observers.