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Congressional committees also have the power to compel testimony from unwilling witnesses, and to cite for contempt of Congress witnesses who refuse to testify and for perjury those who give false testimony.

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There are important corollaries to the investigative power. One is the power to publicize investigations and their results. Most committee hearings are open to the public and are widely reported in the mass media. Congressional investigations represent one important tool available to lawmakers to inform the citizenry and the public interest in national issues. Congressional committees also have the power to compel testimony from unwilling witnesses, and to cite for contempt of Congress witnesses who refuse to testify and for perjury those who give false testimony.

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The first problem is that the U.S. now tends to go to war without having a substantive debate about the human and financial costs that the operation could entail. Asking for a declaration of war, and thus making Congress take responsibility for the decision, had required presidents to enter into a heated debate about the rationale behind the mission, the potential for large-scale casualties and how much money would be spent.

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Very often Congress was also eager to avoid having to decide whether to declare war so it could force presidents to shoulder the blame when things went wrong. At other times, the party in control of Congress agreed with the president's military agenda so that legislators were happy to delegate their authority.

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One of the most important non legislative functions of the Congress is the power to investigate. This power is usually delegated to committees, either the standing committees, special committees set up for a specific purpose, or joint committees composed of members of both houses.

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In 1787, the framers of the Constitution were eager to reject the English precedent granting the king authority over most matters of foreign policy, including military decisions. Consequently, they gave to Congress the key powers of declaring war and raising and regulating the various armed forces.

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The United States' Constitution grants certain powers to Congress, including the power to coin money, or the currency power. Those powers that are clearly stated are known as express powers. However, additional powers are implied or interpreted from the language of the express powers.

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The power to borrow money means that the government can take out loans. The loans are debt obligations and must be repaid. An example of the government's power to borrow is the sale of U.S. Treasury Bonds.

The power to borrow money is not the same as the power to issue money, to create money, or to loan money. All that is meant is what is written: the power to borrow. The clause is limited to the single act of borrowing.

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Congress have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defense and general welfare of the U.S., but all duties, imposts and excises shall be uniform throughout the U.S.

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The power of Congress to regulate interstate and foreign trade, is vital to the welfare of the nation. Its few words have prompted the growth of the greatest open market in the world. The Commerce Clause proved to be more useful for the building of a strong and U.S. out of a weak confederation than any other provision in the Consititution

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There are three branches in the U.S. government: the legislative branch, the executive branch, and the judicial branch. Although each of the branches has their own specific powers and duties, it's really the Congress that has the most clearly expressed powers, seeing as how the Framers of the Constitution thought that institution was going to be the most powerful.

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Delegated powers are government powers specifically outlined in the U.S. Constitution. These powers limit what Congress can do, and also define what Congress is in charge of regulating. Delegated powers are those authorities that the Constitutional framers deemed worthy of Congressional effort and which the framers believed would not limit personal freedoms of individuals. The U.S. Constitution, which is both a concise, and a very old document, establishes rules on what Congress does and does not have control over.