The US-led invasion of Iraq in 2003 has resulted in a resurgence in Kurdish nationalism. There has also been a revival of the terrorist threat directed against Turkey coming from the Kurdistan Workers' Party based in northern Iraq. The inability of the United States to curb the terrorism problem and the increasing instability of the region as a whole have put pressure on the Turkish government to act decisively. Much of this pressure comes from secularists and the army itself, both of which criticize the ruling AK Party because of its failure to provide security. The decision whether to invade northern Iraq will depend on exactly how Prime Minister Recep Tayyip Erdogan chooses to respond to that pressure.