A new poll shows that Democrats are far more likely than Republicans to forget that they once supported the Iraq war.

According to a new Economist/YouGov poll, 63 percent of Americans supported a ground invasion of Iraq in 2003 to remove Saddam Hussein from power. Now, as the popularity of that war has waned significantly, just 38 percent recall admitting they supported sending troops to Iraq in 2003.

But a deeper look at the numbers shows that much of that forgetfulness is on the side of Democrats.

Specifically, 52 percent of Democrats supported the Iraq war in 2003, but only 19 percent of Democrats recall supporting it, according to the poll. Also, 45 percent of Democrats opposed invading Iraq in 2003, but today, 65 percent of Democrats say they remember opposing the invasion.

Republicans are more likely to match their 2015 views on the Iraq war with their 2003 views. In 2003, 84 percent of Republicans supported sending troops to Iraq, compared to 65 percent in 2015 who recall that same support.

Support for the Iraq war has become one of the latest hot button issues for presidential hopefuls, especially Republicans, after likely 2016 presidential hopeful and former Florida Gov. Jeb Bush flip-flopped when asked if he would still have invaded Iraq in 2003.

Today, 55 percent of Americans think the U.S. made a mistake in sending troops to fight in Iraq in 2003, compared to 32 percent who say it was not a mistake. Almost half, 49 percent, say withdrawing troops in 2011 was not a mistake, compared to 36 percent who say it was.

More than half (57 percent) of all Americans believe that knowing what the country knows today, the U.S. should not have sent troops to fight in Iraq in 2003.

The poll of 1,000 U.S. adults was conducted May 16-18 with a margin of error of plus or minus 4.1 percentage points.