It feels like the presidential race is never going to end—but in just over two months, either Hillary Clinton or Donald Trump will become the 45th president of the United States. Then, as a reward for their victory, they’ll face another huge challenge: breaking through the gridlock that cripples American politics.

So who’s better suited to actually make it happen?

Let’s start with Trump—whose recent rise in the polls was accompanied by a heightened focus on Washington dysfunction. If he’s elected, Trump said in mid-October, “Decades of failure in Washington, and decades of special-interest dealing, must and will come to an end.”

Trump has pledged that he’ll “Drain the Swamp," by cracking down on lobbyists and creating term limits for Congress. Of course, to actually implement his vision for the country, he’d also have to collaborate with Congress—including, perhaps, a Democrat-controlled Senate.

Jane Mansbridge, a political scientist at Harvard’s Kennedy School, thinks there’s an outside chance that Trump might be able to do it.

“We already know he’s able think outside classic party lines,” Mansbridge says of Trump.

In Mansbridge’s best-case scenario for a Trump victory, he'd wax surprisingly magnanimous in victory and try to govern as a unifier—perhaps working with Democrats in areas where he’s already broken with Republican orthodoxy, like Social Security and infrastructure investment.

“The highly optimistic story would be that he’d be able to access that part of him, access that forward- looking, energetic new ideas part of him, and reach out,” Mansbridge says.

“It’s not likely, but I can conceive of Trump coming out of it and saying, ‘OK, now let’s work together.’”

Then again, Trump could alienate Democrats by following through on his promise to appoint a special prosecutor to investigate Hillary Clinton—and, while he’s at it, continue his beef with Republican House Speaker Paul Ryan.

And what of Hillary Clinton? She’s promised to work with Republicans on immigration. And her running mate, Tim Kaine, says Clinton is eager to work across the aisle.

“We’re going to need Republican votes in Congress for things that we want to do for the good of the country,” Kaine told the Associated Press last month.

Problem is, some Republicans have vowed to block any Clinton Supreme Court pick—and to keep investigating Clinton’s use of a private email server if she wins.

Even so, Mansbridge says there might be ways for Clinton to collaborate with the GOP.  

“Behind the scenes, she knows Republicans—she’s worked with them as a US senator,” Mansbridge points out. “Her staff knows people…. Particularly on the non-hot button issues, I think quite lot can be done with the will to get it done.”

But Mansbridge also says the toll taken by partisanship—which she believes is closely linked to the rise of income inequality in the US—shouldn’t be underestimated. 

“Back in the 1960s, only about five percent of Republicans and four percent of Democrats said they’d be unhappy if their child married somebody from the other party,” she says. “Now 49 percent—almost half of Republicans—say they’d be unhappy, and about a third of Democrats.

‘It’s going to take a lot of counter-effort to try to reach across party lines to negotiate deals in this very, very poisoned environment,” she adds.

And after this remarkably bitter election, it’s not clear that either Trump or Clinton would be up to the task.