The pendulum of power is swinging more and more frequently in the United States.

In the 100 years between 1900 and 2000, control of the House, Senate or White House changed hands in Washington with relative infrequency and never in more than two elections in a row.

In the 25 years since 2000, the party controlling the White House and/or at least one chamber of Congress changed in all but two US elections.

It is an unprecedented period of political turnover in which voters have pulled the lever for some kind of change – either picking a president from a new party or flipping the majority in the House or Senate – nearly every time they’re given the chance in recent years.

At least one lever of power has flipped between Republicans and Democrats in Washington in each of the last six elect

See Full Page