Steven Seward wrote:
If you are going to compare wars in history, then you will have to concede that the vast majority of times the U.S. has gotten into war, Democrats were in control. That would be War of 1812, The Mexican-American War, The American Civil War (started by Democrats who controlled the South), World War I, World War II, The Korean War, and the Vietnam War. The only exceptions were the short Spanish American War, and both Gulf Wars.
Actually the last time that there was a joint resolution in Congress declaring a "state of war" was on June 5, 1942 for World War II when the United States declared war on Bulgaria, Romania, and Hungary.
Since then the United States has used the term "Authorization to use Military Force".