Okay kiddo, let's talk about the invasion of Iraq. So, first, you need to understand that Iraq is a country in the Middle East and the United States is a country in North America. In 2003, the United States, along with some other countries, decided to invade Iraq. This means that they sent their soldiers and weapons to take control of the country.
Now, some people in the United States thought this was a good idea because they believed that the leader of Iraq, Saddam Hussein, was a bad guy and posed a threat to the United States. They also believed that Iraq had weapons of mass destruction, which means really scary weapons like nuclear bombs.
But other people in the United States did not think it was a good idea to invade Iraq. They thought it was wrong to go to war without a good reason, and they didn't believe that Iraq posed a threat to the United States. They were worried that lots of innocent people would be hurt or killed in the war and that it would cause more problems than it would solve.
As the war went on, opinions started to change. Some people who had supported the war realized that it was a mistake and that the United States shouldn't have gotten involved in Iraq. They thought that the war was making things worse for the people of Iraq and for the soldiers who were fighting there.
So, the popular opinion in the United States about the invasion of Iraq was divided. Some people thought it was a good idea, but others thought it was a bad idea. And even among those who originally supported the war, many changed their minds as the war continued.