the KMT, People First Party, and New Party and the Pan-Green Coalition formed by the Democratic Progressive Party and Taiwan Solidarity Union. In the 2001 LY elections, the DPP won a plurality of seats for the first time. However, the Pan-Blue Coalition held a small majority over the Pan-Green Coalition, causing much of President Chen's agenda to be derailed. This also gave independents in the legislature more power, some of whom founded the Non-Partisan Solidarity Union in 2004. In a hotly contested election on 20 March 2004, President Chen Shui-bian was re-elected by 50.1% of the popular vote to a second term. The election was marred by a shooting incident the day before the election during which President Chen and his running mate Vice President Annette Lu were slightly wounded. While the opposition contested the results and suggested the shooting was staged to win sympathy (as President Chen had previously been slated to lose narrowly), it was the first time that the DPP has won an outright majority in an island-wide election. The March election also included a "peace referendum". Historically, the issue of referendums has been closely tied to the question of Taiwan independence, and thus has been a sensitive issue in cross Strait relations. There were two referendums before the voters on 20 March 2004. The first asked in light of the PRC missile threat whether the ROC should purchase anti-missile systems. The second asked whether Taiwan should adopt a "peace framework" for addressing cross Strait differences with the PRC. However both referendums failed to obtain support from over 50% of registered voters, as required to be valid. The Pan-Blue Coalition campaigned against the referendum as unnecessary and urged voters to boycott it. President Chen Shui-bian has called for major constitutional reforms by 2006 aimed at further reducing layers of government, and making other structural changes aimed at improving governance. The People's Republic of China has accused Chen of using the constitution issue to move Taiwan towards independence. He expressed opposition, however, in his 20 May 2004 inaugural address to using constitutional reform to alter the constitution's definition of Taiwan sovereignty. The Legislative Yuan passed a set of constitutional amendments on 23 August 2004 that halve the number of LY seats and create single-member districts. The revisions also eliminate the role of the National Assembly and permit the public to confirm or reject future revisions passed by the