It's the economy, stupid
In order to keep the campaign on message, Carville hung a sign in Bill Clinton's Little Rock campaign headquarters that read:
#Change vs. more of the same. #The economy, stupid
#Don't forget health care. Although the sign was intended for an internal audience of campaign workers, the second phrase became a "de facto" slogan for the Clinton election campaign. The phrase has become a snowclone repeated often in American political culture, usually starting with the word "it's" and with commentators sometimes using a different word in place of "economy". Examples include "It's the deficit, stupid!" "It's the corporation, stupid!" "It's the math, stupid!", and "It's the voters, stupid!"
History
"The economy, stupid" is a phrase that was coined by James Carville in 1992. It is often quoted from a televised quip by Carville as 
"It’s the economy, stupid." His phrase was directed at the campaign's workers and intended as one of three messages for them to focus on. The others were "Change vs. more of the same" and "Don't forget health care.