President Trump would lose a hypothetical matchup against fellow billionaire businessman Mark Cuban if the 2020 presidential election was held today.

Public Policy Polling released an Aug. 18 to 21 survey Wednesday that found 42 percent of registered voters would pick Cuban for commander in chief compared to Trump's 38 percent support.

The advantage has slipped from Trump's grasp, as he was leading the NBA Dallas Mavericks owner in February 41 percent to 40 percent.

Cuban isn't counting out a run for the highest elected office. He told Business Insider on Wednesday that he would run -- likely as a Democrat or independent -- if he had answers to issues plaguing the country.

"These are always entertaining," Cuban wrote in an email. "As I have said before, I would only run if I can come up with solutions for healthcare, the plight of working families, and reducing the stress levels of our country. It's possible. When I have something to offer, I will."

The top-performers in a potential election against Trump are Sen. Bernie Sanders, I-Vt., and former Vice President Joe Biden. Both men received support from 51 percent of respondents compared to the sub-40 percent who backed Trump.

The poll was conducted among 887 registered voters nationwide and had a 3.3-percentage-point margin of error.