Representative Ilhan Omar of Minnesota apologized for insinuating that American support for Israel is fueled by money from a pro-Israel lobby group — a comment that drew condemnation from fellow Democrats.

In Iowa, Senator Cory Booker pledged to restore “grace and decency,” while Senator Elizabeth Warren vowed to “fight my heart out.” The two Democratic presidential candidates present voters with a philosophical choice between reuniting a divided country or crushing Mr. Trump and his party.

A Virginia state legislator intended to begin impeachment proceedings against Lt. Gov. Justin Fairfax over accusations of sexual assault, but backed down after African-American lawmakers demanded there not be a rush to oust Mr. Fairfax.

In a move that challenges Mr. Trump’s warnings of a national security crisis, California’s governor, Gavin Newsom, announced that he would withdraw nearly 400 of his state’s National Guard troops from the U.S.-Mexico border.

The Trump administration is pressuring Iraq to stop buying energy from Iran, its sole foreign supplier, but Iraqi leaders are resisting because they fear power shortfalls and mass protests.