The 1964 presidential race between Lyndon Johnson and Barry Goldwater revealed which of the following political developments?

This choice reflects a later development in American economic policy, primarily emerging in the 1980s with the Reagan administration. During the 1964 election, supply-side economics was not yet a dominant ideology; thus, it does not accurately represent the political landscape at that time.

In 1964, southern states were largely resistant to federal civil rights legislation, as many actively opposed the civil rights movement. The election did not indicate a willingness among these states to support such measures, making this choice incorrect.

While the anti-Vietnam War movement gained traction in subsequent years, its influence on the Democratic Party's foreign policy was not as prominent during the 1964 presidential election. The focus of that election was more on domestic issues and civil rights rather than foreign policy.

During the 1964 election, the Republican Party was still grappling with its ideological divisions, but the prominent theme was more about the rise of Barry Goldwater's conservatism rather than a clear shift of power from western conservatives to eastern moderates. This choice misrepresents the dynamics of the party at that time.