Problem: Expose is an American Latin freestyle vocal group. Primarily consisting of lead vocalists Jeanette Jurado, Ann Curless, and Gioia Bruno, the group achieved much of their success between 1984 and 1993, becoming the first group to have four top ten hits on the Billboard Hot 100 chart from its debut album, including the 1988 #1 hit "Seasons Change". In March 2015, Billboard magazine named the group the eighth most-successful girl group of all-time. The group was popular in dance clubs, mainstream Top 40 and adult contemporary charts in the United States.

During the recording of the group's first studio album Exposure, the personnel of the group changed. Reports vary based on the source. According to People magazine, one of the original singers quit while two of the girls were fired midway through the recording of the first album, but according to Billboard, all three were fired. Arista records felt that the three original singers lacked star potential. Martinee states that he made the decision himself to replace the three girls, while Miller maintains it was all their choice, and Jurado confirms that Lorenzo wanted to leave. Shortly thereafter, Casanas pursued a solo career and Lorenzo pursued other ambitions; they were replaced by Jeanette Jurado and Gioia Bruno. Miller began a solo career; she was replaced by Ann Curless. Lorenzo returned to the dance charts with the Vendetta Records releases "I Wanna Know" in 1988, and "Stop Me if I Fall in Love" in 1990, while Laurie Miller released the 12" single "Parallels" on Atlantic Records and a second single "Love is a Natural Magical Thing" on Meet Me In Miami Records. Laurie evolved into a headline performer frequently showcasing her talents on cruises with a more intimate jazz style, and formed her own entertainment company called Xica productions. Casanas later resurfaced as a solo artist (Sandee) and released a solo album, Only Time Will Tell, which garnered the club hits "You're The One", "Love Desire", and the Clivilles & Cole-produced bassline-heavy hit "Notice Me". She continued to tour actively in dance clubs and freestyle shows, until her death on December 15, 2008, of a seizure at the age of 46. All three original members: Casanas, Lorenzo and Miller later contributed vocals on songs on the Miami group Will to Power's eponymous 1988 debut album. Gioia Bruno also provided lead vocals on Will to Power's 2004 album, Spirit Warrior.

Why were two fired?

Answer with quotes: but according to Billboard, all three were fired. Arista records felt that the three original singers lacked star potential.

Question:
Norquist grew up in Weston, Massachusetts. He is the son of Carol (nee Lutz) and Warren Elliott Norquist (a vice president of Polaroid Corporation), and is of Swedish ancestry. His brother, David Norquist has served in senior posts in Republican administrations at both the United States Department of Defense and the United States Department of Homeland Security. Norquist became involved with politics at an early age when he volunteered for the 1968 Nixon campaign, assisting with get out the vote efforts.
Norquist is best known for founding Americans for Tax Reform (ATR) in 1985, which he says was done at the request of then-President Ronald Reagan. Referring to Norquist's activities as head of ATR, Steve Kroft, in a 60 Minutes episode that aired on November 20, 2011, claimed that "Norquist has been responsible, more than anyone else, for rewriting the dogma of the Republican Party." The primary policy goal of Americans for Tax Reform is to reduce government revenues as a percentage of the GDP. ATR states that it "opposes all tax increases as a matter of principle." Americans for Tax Reform has supported Taxpayer Bill of Rights (TABOR) legislation and transparency initiatives, while opposing cap-and-trade legislation and efforts to regulate health care. In 1993, Norquist launched his Wednesday Meeting series at ATR headquarters, initially to help fight President Clinton's healthcare plan. The meeting eventually became one of the most significant institutions in American conservative political organizing. The meetings have been called "a must-attend event for Republican operatives fortunate enough to get an invitation", and "the Grand Central station of the conservative movement." Medvetz (2006) argues that the meetings have been significant in "establishing relations of...exchange" among conservative subgroups and "sustaining a moral community of conservative activists." As a nonprofit organization, Americans for Tax Reform is not required to disclose the identity of its contributors. Critics, such as Sen. Alan Simpson, have asked Norquist to disclose his contributors; he has declined but has said that ATR is financed by direct mail and other grassroots fundraising efforts. According to CBS News, "a significant portion appears to come from wealthy individuals, foundations and corporate interests."
Answer this question using a quote from the text above:

What is Grover's involvement with Americans for Tax Reform?

Answer:
Norquist is best known for founding Americans for Tax Reform (ATR) in 1985,