Former Rhode Island Gov. Lincoln Chafee will announce he is running in the 2016 presidential election on Wednesday.

The Republican-turned-Independent-turned-Democratic politician is expected to launch his bid to seek the Democratic presidential nomination in a speech delivered at George Mason University on Wednesday evening.

This will make Chafee the fourth Democratic hopeful to officially enter the race. However, he will face nearly impossible odds in beating the likes of Democratic front-runner Hillary Clinton and leftist favorite Vermont Sen. Bernie Sanders.

Unlike Clinton, the former Republican U.S. senator notably voted against the 2002 Iraq war.

"I don't think anybody should be president of the United States that made that mistake" of voting for the Iraq War, Chafee told The Washington Post in April. "It's a huge mistake, and we live with broad, broad ramifications today -- of instability not only in the Middle East but far beyond and the loss of American credibility. There were no weapons of mass destruction."

Chafee has spent most of his life as a Republican and was elected to the U.S. Senate in 2000 as part of the GOP. He served only one term, losing to Democrat Sheldon Whitehouse in 2006, but then successfully ran for governor of Rhode Island as an independent. He then became a Democrat in 2013.

During an interview with CNN in April, the former governor took a jab at the former secretary of state, saying: "Considering the premise for invading Iraq was based on falsehoods and considering the ramifications we live with now from that mistake, I would argue that anybody who voted for the Iraq War should not be president and certainly should not be leading the Democratic Party."

He also said, if he decides to jump into the race, it will be because he has "the organization in place to continue this into that long road ahead ... and I plan not to spend a lot of money, but nonetheless, there has to be some fundraising."