Donald Trump, be careful what you wish for.

The president said last week he would relish the chance of going up against Barack Obama in a general election.

However, the Constitution is “fairly straightforward” in barring presidents from a third term, according to the Associated Press.

“I’d love that. That would be a good one, I’d like that,” Trump told reporters last week.

After telling NBC News’ “Meet the Press” he was “not joking” about seeking a third term, Trump said he had not seriously pursued how he could become president a third time.

“I never looked into it. They do say there’s a way you can do it, but I don’t know about that,” the president said. “I haven’t looked into it. I want to do a fantastic job. We have four years, just about …”

If there is a way for Trump and Obama to serve thrice, voters have a clear favorite for who would become the first three-term president since Franklin D. Roosevelt.

Obama would win a hypothetical matchup against Trump in 2028, 53% to 47%, according to an Overton Insights poll conducted March 24 to March 28 and released last week.

Obama’s victory would be outside the poll’s margin of error of plus-or-minus 2.77%.

Of those polled, Trump would lose the support of 10% of voters who cast a ballot for him in 2024, the poll found.

Meanwhile, 3% of Kamala Harris voters would side with Trump against Obama in 2028, according to the survey.