Most probably one of the supporters of President Herbert Hoover, when he campaigning for the presidency. The phrase that goes "...a chicken in every pot and a car in the garage (not two)" was apparently not originally from President Hoover.
"The Hoover campaign used a variety of slogans in 1928 including "Vote for Prosperity," "Lest We Forget" (referring to Hoover's World War I relief work), and "Who but Hoover?"
Other slogans were introduced by Hoover supporters, often without direct input from Mr. Hoover. The link between Hoover and the phrase "a chicken in every pot" can be traced to a paid advertisement which apparently originated with the Republican National Committee, who inserted it into a number of newspapers during the 1928 campaign. The ad described in detail how the Republican administrations of Harding and Coolidge had "reduced hours and increased earning capacity, silenced discontent, put the proverbial 'chicken in every pot.' And a car in every backyard, to boot." The ad concluded that a vote for Hoover would be a vote for continued prosperity.
Hoover did make a variety of optimistic statements during the campaign, such as, "the slogan of progress is changing from the full dinner pail to the full garage," and "given a chance to go forward with the policies of the last eight years, and we shall soon with the help of God be in sight of the day when poverty will be banished from this Nation," but Hoover never promised "a chicken in every pot."
https://www.americanheritage.com/political-slogan
