A new Public Policy Polling survey in Pennsylvania finds Donald Trump leading the GOP presidential race with 51%, followed by Ted Cruz at 25% and John Kasich at 22%.

On the Democratic side, Hillary Clinton leads Bernie Sanders 51% to 41%.

Sen. Ted Cruz and Gov. John Kasich “have agreed to coordinate in future primary contests in a last-ditch effort to deny Donald J. Trump the Republican presidential nomination, with each candidate standing aside in certain states amid growing concerns that Mr. Trump cannot otherwise be stopped,” the New York Times reports.

“In a statement late Sunday night, Mr. Cruz’s campaign manager, Jeff Roe, said that the campaign would ‘focus its time and resources in Indiana and in turn clear the path for Governor Kasich to compete in Oregon and New Mexico.’ Minutes after Mr. Roe’s statement, the Kasich campaign put out a similar message.”

Trump responded on Twitter: “Lyin’ Ted and Kasich are mathematically dead and totally desperate. Their donors & special interest groups are not happy with them. Sad!”

“Even as his chances of winning the Democratic presidential nomination slip away, Sen. Bernie Sanders and his allies are trying to use his popularity to expand his political influence, setting up an ideological struggle for the soul of the Democratic Party in the post-Obama era,” the New York Times reports.

“Amid his unexpectedly strong showing in the Democratic primaries, Mr. Sanders has tapped his two-million-person donor list to raise money for liberal congressional candidates in New York, Nevada and Washington State. And in the waning months of Barack Obama’s presidency, Mr. Sanders’s allies are testing their muscle against the White House, mounting a public attack on the president’s housing secretary, Julián Castro, over his department’s sales of delinquent mortgages to banks and private equity firms.”

Washington Post: “Transgender rights have become an unlikely and heated issue in the presidential campaign after North Carolina enacted a law that, among other things, mandated that people use the bathroom that corresponds to the gender on their birth certificate.”

“Cruz has seized on Trump’s assertion that the North Carolina law, which also rolled back other protections for gay, lesbian and transgender people, was unnecessary and bad for business — corporations including PayPal and Deutsche Bank scrapped plans to create jobs in the state after the legislation was enacted. Trump said there has been ‘little trouble’ with allowing people to use the bathroom they want, though he later said that states should have the power to enact their own laws. Trump also said he would let transgender reality television star Caitlyn Jenner use the women’s bathroom at his properties.”

New York Times: Two states see tourist backlash after LGBT rights legislation

Mark Salter: “He might lose more Republicans and Republican-leaning independents in November than he won in the primaries. It’s possible that as much as a third of Republicans won’t vote for him, especially if a conservative alternative runs independently.”

“It’s safe to say and a comfort to know that barring some catastrophic misfortune, Donald Trump will be remembered as one of the biggest losers in the history of presidential elections.”

“I feel better just writing that.”