Congress is the legislative branch of the United States government. Analysists have said that the two chambers, the Senate and the House of Representatives, are the cleverest and most accurate law making branch in the world. Members of both houses have the opportunity of casting votes in committees and on the floor of their chambers on numerous Bills and resolutions every year. Since the mid to late 20th Century, the tendency of Congress has been for the House and the Senate to be of a different political party than that of the President. One of the main influences on voting...
expanded work-load and the increasingly technical nature of much of the legislation with which Congress deals, many of the staff employed are experts in particular fields. Congressmen , therefore, tend to become more dependent on the views of their advisers when they decide how to vote on a Bill, particularly if it is in an area in which they have neither the time nor interest to become involved themselves.

In conclusion, it is found that there are many influencing factors in how Congressmen vote, and that, unlike in Britain, party cohesion is not the most significant factor in American politics.