Prospero Arreza Pichay Jr., also known as Butch Pichay, is a Filipino politician who served as Representative of Surigao del Sur's 1st district in the Philippine House of Representatives from 1998 to 2007 and from 2016 to 2022. He was the chairman of the House Committee on National Defense in the 13th Congress and deputy speaker in the 17th and 18th Congresses. He is a member of the formerly dominant political party Kabalikat ng Malayang Pilipino and was a senatorial aspirant in the 2007 Philippine Senate election but lost.

The 2007 election of members to the Senate of the Philippines was the 29th election to the Senate of the Philippines. It was held on Monday, May 14, 2007, to elect 12 of the 24 seats in the Senate. The winners in this election joined the winners of the 2004 election to form the 14th Congress of the Philippines. The senators elected in 2004 will serve until June 30, 2010, while the senators elected in this election will serve up to June 30, 2013. The elections to the House of Representatives as well as local elections occurred on the same date. The Philippines uses plurality-at-large voting for seats in the Senate.