The 1967 war produced donor enforcement of pro-Israel loyalty in US politics

Evidence

When Israel won the 1967 Six-Day War against Jordan, Syria, and Egypt, dues-paying membership in the American Israel Public Affairs Committee (AIPAC) boomed. Jewish political activity intensified each subsequent year, such that by 1972, a Democratic presidential candidate who did not support Israel, as George McGovern discovered, would be abandoned by the majority of American Jewish donors who subscribed to the Zionist project in the Middle East. — Sahar F. Aziz, The Racial Muslim, 627