02:50
Leader for a Nation: Factors Beyond a President's Control
When the American public assesses the president's job performance, cautions presidential scholar Sam Kernell, "we need to keep in mind that presidents don't really call the shots." Pressure groups, ideological differences within their own party, una...
01:47
Party Politics: Ideological Differences Between Republicans and Democrats
There are distinct ideological differences between Republicans and Democrats. In recent years the Republicans have become more coherent in their conservatism, whereas Democrats debate about whether or not the party should be more moderate. Democrats...