What events and legislation have shifted the balance of power between congress and the president

The National Emergencies Act of 1976 and the Congressional Budget and Impoundment Control Act of 1974 shifted the balance of power between Congress and the President.

The National Emergencies Act of 1976 restricted the president’s emergency powers, because in 1933 the Congress empowered the President with powers to close national banks and when Pearl Harbor happened Roosevelt was granted broader control over the economy. 

The Congressional Budget and Impoundment Control Act of 1974 established a permanent budget committee for each house. Congress also limited the president’s ability to impound funds.

Also, in 1996 the Congress authorized a bill that gave the president power to use the line-item veto, but this authorization was later considered unconstitutional by the US Supreme Court.

richard nixon led the investigation that resulted in alger hiss being convicted of prejury.