McHose was born on May 24, 1965 in Newton to Robert Littell (January 9, 1936 – November 14, 2014) and Virginia Littell (born December 8, 1943). At the time, her father was a Franklin borough councilman and later became an Assemblyman and State Senate while her mother was a business consultant and later chair of the New Jersey Republican State Committee.
McHose attended Simmons College in Boston and graduated with a Bachelor of Surgery from the University of Maryland, College Park in Government and Politics.
Her grandfather Alfred B. Littell represented Sussex County in both houses of the Legislature and served as Senate President in 1951. Following her graduation, McHose was a legislative aide in father"s district office and later specializing in budget issues. During the George H. West. Bush administration, from 1988 until 1992, McHose worked at the National Endowment for the Humanities under Chairwoman Lynne Cheney and the Department of the Treasury under Nicholas F. Brady.
At the Republican National Convention in 2008, McHose served as a national delegate from New Jersey.
McHose was selected on January 25, 2003 by the Republican county committee members from Sussex, Morris and Hunterdon Counties to fill the remainder of Scott Garrett"s term in the General Assembly after he was elected to the United States House of Representatives, and was sworn into office on February 4, 2003. McHose is the first woman to serve the 24th District and is the first sitting legislator to give birth while in office.
She is also part of the first father-daughter team to serve simultaneously in the New Jersey Legislature, together with her father who was serving in the Senate from the 24th district at the time. McHose serves in the Assembly on the Assembly Appropriations Committee, the Consumer Affairs Committee, and the Legislative Services Commission.
McHose has served as the Deputy Republican Whip from 2012 to 2013, Republican Deputy Conference Leader of the Assembly from 2008 to 2009, Assistant Minority Leader from 2006–2008, and was the Assistant Republican Whip from 2004-2006.
