The National Coalition government led by Liam Cosgrave governed Ireland from 1973 to 1977. It struggled with high inflation and rising unemployment caused by the global 1973 oil crisis. It supported Ireland joining the European Economic Community and negotiated the Sunningdale Agreement to share power in Northern Ireland. However, the agreement collapsed and violence from the IRA increased. The government introduced tough anti-terrorism laws that led to a constitutional crisis when the President resigned. Facing growing economic problems and controversy over boundary changes, the National Coalition suffered a landslide defeat in the 1977 election.