WASHINGTON (AP) — The Latest on Campaign 2016 two days before voters in Rhode Island, Pennsylvania, Connecticut, Delaware and Maryland cast votes for their presidential nominees (all times Eastern Daylight Time):

12:05 p.m.

Billionaire Charles Koch says he doesn't anticipate spending money on supporting or opposing the Republican presidential nominee — and he's leaving open the prospect that Hillary Clinton might be preferable to anyone currently seeking the GOP nod.

He says the candidate has to be liked as much as Ronald Reagan and "compete on making the country better" rather than tearing down opponents. Donald Trump, Ted Cruz and John Kasich, he said on ABC's "This week," ''are terrible role models." He denies giving money to efforts to oppose Trump.

Koch also said "it's possible" that Hillary Clinton would be better than a Republican. But he says that he'd "have to believe her actions would be quite different than her rhetoric." The same standard, he said, goes for Republicans.

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12:00 p.m.

Hillary Clinton is reflecting on the life of Harriet Tubman in a Philadelphia church.

At Triumph Baptist Church in North Philadelphia on Sunday, Clinton praised the abolitionist for the "contributions she made to our freedom," and evoked the image of a "feisty determined woman leading slaves to freedom."

It was announced this week that that Tubman would be featured on the $20 bill. Clinton said she had visited Tubman's upstate New York home during her time as that state's senator.

Before the largely African-American congregation, Clinton also promised to work on reforming the criminal justice system and pledged to do "everything I can to take on the gun lobby."

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10:30 a.m.

Donald Trump's chief political adviser says "we're evolving the campaign, not the candidate" — adding policy speeches for a front-runner whose style has been heavy on bombast.

Paul Manafort tells "Fox News Sunday" that Trump is paying more attention to the political nuts and bolts — from counting delegates and working with party leaders.

Manafort also contends that his recorded comments at a GOP gathering last week — when he told party leaders Trump was "playing a part" onstage — were taken out of context.

Trump told supporters on Saturday that "being presidential's easy," and that he's got "to rant and rave" at rallies or people "will fall asleep."

Trump said he has no intention of reversing his provocative proposals, including building a wall along the Mexican border.