Checks and balances Representative Lee H. Hamilton explained how Congress functions within the federal government: To me the key to understanding it is balance. The founders went to great lengths to balance institutions against each otherbalancing powers among the three branches: Congress, the president, and the Supreme Court; between the House of Representatives and the Senate; between the federal government and the states; among states of different sizes and regions with different interests; between the powers of government and the rights of citizens, as spelled out in the Bill of Rights... No one part of government dominates the other. The Constitution provides checks and balances among the three branches of the federal government. Its authors expected the greater power to lie with Congress as described in Article One. The influence of Congress on the presidency has varied from period to period depending on factors such as Congressional leadership, presidential political influence, historical circumstances such as war, and individual initiative by members of Congress. The impeachment of Andrew Johnson made the presidency less powerful than Congress for a considerable period afterwards. The 20th and 21st centuries have seen the rise of presidential power under politicians such as Theodore Roosevelt, Woodrow Wilson, Franklin D. Roosevelt, Richard Nixon, Ronald Reagan, and George W. Bush. Congress restricted presidential power with laws such as the Congressional Budget and Impoundment Control Act of 1974 and the War Powers Resolution. The presidency remains considerably more powerful today than during the 19th century. Executive branch officials are often loath to reveal sensitive information to members of Congress because of concern that information could not be kept secret; in return, knowing they may be in the dark about executive branch activity, Congressional officials are more likely to distrust their counterparts in executive agencies. Many government actions require fast coordinated effort by many agencies, and this is a task that Congress is ill-suited for. Congress is slow, open, divided, and not well matched to handle more rapid executive action or do a good job of overseeing such activity, according to one analysis. The Constitution concentrates removal powers in the Congress by empowering and obligating the House of Representatives to impeach executive or judicial officials for "Treason, Bribery, or other high Crimes and Misdemeanors". Impeachment is a formal accusation of unlawful activity by a civil officer or government official. The Senate is constitutionally empowered and obligated to try all impeachments. A