Following on the footsteps of presidential hopeful Jeb Bush, Sen. Marco Rubio defended President George W. Bush’s decision to invade Iraq in 2003. The Florida senator was asked on Fox News about the war, but he struggled to give a concise answer, ultimately saying, “It was not a mistake.”

Fox News’ Chris Wallace hit Republican Sen. Rubio with a question concerning his apparent flip on the Iraq War. Wallace confronted the Florida senator and points out how in March he said it was not a mistake, but in May he backtracked.

“Six weeks ago it made sense to invade Iraq in 2003,” said Wallace. “Now you said it was a mistake.”

“No, they're two different questions,” Sen. Rubio answered, referring to the clips Wallace showed.

“It was not a mistake. The president, based on -- this is the way the real world works. The president, based on the information that was provided to him.”

The back and forth, in which the two interrupted each other constantly, showed Sen. Rubio unable to answer the question concisely. Wallace continued to press Sen. Rubio to answer clearly, but the senator kept trying to point out the difference in the questions asked.

However, Wallace then addressed him directly, asking if the war was a mistake.

“It was not a mistake for the president to go into Iraq based on the information he was provided as president,” he said, despite Wallace reiterating whether it was the right choice knowing what we know today.

“If the president had known that there were no weapons of mass destruction at the time, you still would have had to deal with Saddam Hussein,” Sen. Rubio continued. “But the process would have been different. I doubt very seriously that the president would have gotten, for example, congressional approval to move forward with an invasion had they known there were no weapons of mass destruction.”

He added that President Bush did not have the benefit of hindsight and continued to defend the decision by stating the information provided at the time showed Iraq had WMDs.

Sen. Rubio did tout the one benefit the invasion brought: the deposing of dictator Saddam Hussein.

Some have argued, including President Barack Obama, that the invasion of Iraq has destabilized the region, prompting the rise of ISIS and other terror groups.

“Two things: One is ISIL is a direct outgrowth of al-Qaida in Iraq that grew out of our invasion,” the president Obama told VICE News. “Which is an example of unintended consequences. Which is why we should generally aim before we shoot.”

Sen. Rubio was asked about Iraq because Bush was asked last week about it, saying he would have invaded knowing what we know today. He then spent the rest of the week clarifying his stance.

Governor Scott Walker, a Republican from Wisconsin, also appears ready to join the growing list of Republican candidates. Bob Schieffer asked him Sunday on CBS’s “Face the Nation” on Bush’s answer.

“I think any president, regardless of party, probably would have made a similar decision to what President Bush did at the time with the information he had available,” the governor explained, highlighting Hillary Clinton’s vote in favor of invasion.

“Knowing what we know now I think it's safe many of us, myself included, to say we probably wouldn't have taken that tact.”