Joseph McCarthy: successfully uncovered the communist infiltration of the federal government. was hailed as an American hero for his fight against communism. had the full support of the Senate during his anticommunist crusade. was an embarrassment to his party by 1954. successfully uncovered the communist infiltration of the U. S. army.

The answer is: Was an embarrassment to his party by 1954.

Explanation:

Joseph McCarthy American senator who orchestrated a sensational and hysterical "witch hunt" against communism in the early fifties, opening one of the saddest periods in US history, known as the "MaCartismo" period.

In 1954, McCarthy lost the little prestige he had left by being broadcast on television the Senate hearing against Army officers for his alleged communist activity. His demagogic and brutal style was exposed.

The answer is: Was an embarrassment to his party by 1954.

not sure might be he acquired the entire oregon territory from great britain