While Soutine--unlike Chagall, to whom he is sometimes compared--did not paint stereotypically Jewish subjects, he may have been alluding, with those dangling fowl, to a Yom Kippur rite in which a slaughtered chicken was whirled around a rabbi's head in a ritual of absolution.
Soutine and Chagall are artists who created paintings.
Despite his unpopularity due to the Vietnam War, the economy had recovered enough that Nixon was looked on favorably by a lot of voters.