What is the name of the pet cat of the U.S. President Bill Clinton's family during his presidency and part of the 1998 children's book written by First Lady Hillary Clinton?
Socks
Title: Dear Socks, Dear Buddy
Passage: Dear Socks, Dear Buddy: Kids' Letters to the First Pets is a 1998 children's book written by First Lady of the United States Hillary Rodham Clinton.  It concerns the two pets that lived in the White House during the Clinton administration, Socks the cat and Buddy the dog.
Title: Clinton family
Passage: The Clinton family is a prominent American political family related to Bill Clinton, the 42nd President of the United States (1993–2001), and his wife Hillary Clinton, the 67th United States Secretary of State (2009–13), Senator from New York (2001–09) and the First Lady of the United States (1993–2001).  Their immediate family was the First Family of the United States from 1993 to 2001.  In 2016, Hillary Clinton became the first female presidential nominee from a major political party in United States history.  The Clintons (Bill and Hillary) are the first married couple to each be nominated for president.  She was defeated in the election by businessman Donald Trump.
Title: Socks (cat)
Passage: Socks Clinton (Spring 1989 – February 20, 2009) was the pet cat of U.S. President Bill Clinton's family during his presidency.  As an adopted stray cat, he was the only pet of the Clintons during the early years of the administration, and his likeness hosted the children's version of the White House website.  After Clinton left office, Socks resided with former Clinton secretary Betty Currie and her husband, owing to continuing conflicts with Clinton's dog Buddy.
Socks (cat) Dear Socks, Dear Buddy