Axios

President Trump's national security adviser accidentally invited the editor-in-chief of The Atlantic to a group text in which top officials debated highly sensitive plans for bombing Yemen, the magazine reported Monday.

Why it matters: The extraordinary breach exposed classified information and private deliberations among the highest-ranking officials in the U.S. government, and raised serious questions about the lax handling of America's secrets by Trump's Cabinet.

The alleged Venezuelan gang members deported by the Trump administration earlier this month are likely to suffer "significant harm" in El Salvador, a federal judge asserted Monday.

Why it matters: The Trump administration's decision to deport the alleged gang members in defiance of a court order has set up a high-stakes legal battle that could test the limits of President Trump's power.

More than 50,000 Palestinians have been killed in the Gaza strip since the start of the Israel-Hamas war, the enclave's Hamas-run health ministry said Sunday.

The big picture: The grim milestone comes after Israel launched a series of massive airstrikes on Gaza, shattering a roughly two-month ceasefire.

The White House plans to spare specific sectors from wide-ranging tariffs expected early next month, Bloomberg and the Wall Street Journal reported on Monday.

Why it matters: Stocks jumped in early trading after reports that suggested the much-hyped "Liberation Day" might not be as harsh or broad as previously expected.

Greenland's prime minister slammed an upcoming trip to the island by Second Lady Usha Vance and other U.S. officials as "aggressive" and a clear show of power.

Why it matters: President Trump's desire to take over the island has set U.S. allies on edge and drawn repeated rebukes from Greenlandic and Danish officials.

Canadian Prime Minister Mark Carney on Sunday called a snap federal election, emphasizing the urgent need to counter President Trump's confusion-inducing trade war.

The big picture: Trump's anger-triggering tariffs and threats of making the close U.S. ally the 51st state have shaken up Canadian politics and bolstered a sense of nationalism, signaling changing fortunes for the recently unpopular Liberal leadership.

After a 5-week hospital stay that triggered fears of a potential papal resignation, Pope Francis returned to the Vatican Sunday.

The big picture: But now, two months of rest and recovery prescribed by his doctors begin — just weeks out from Easter Sunday and the holiest days of the Catholic Church's year.