The Latest: O'Rourke chides Trump over family separations

Ray Frederick, 7, holds a sign that reads "2020 Gi...

Ray Frederick, 7, holds a sign that reads "2020 Gi...

Democratic presidential candidate Sen. Bernie Sand...

Democratic presidential candidate Sen. Bernie Sand...

The Latest on the 2020 campaign season (all times Eastern):

1:25 p.m.

Democratic presidential candidate Beto O'Rourke is telling voters in Las Vegas that President Donald Trump bears blame for the separation of families at the U.S.-Mexico border but responsibility lies with everyone in the country to fix the situation.

O'Rourke spoke Sunday to more than 200 people packed into and snaking around a taco shop on the city's north end. He says immigrant families are leaving their home countries and journeying on foot because they have no other choice.

The former Texas congressman says desperate families were broken up in the U.S. when they were at their most vulnerable and desperate moments, and what happened to them "is on every single one of us."

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9 a.m.

As New York Sen. Kirsten Gillibrand officially kicks off her Democratic presidential campaign in New York City, her rivals are courting voters in early primary states.

Several Democratic White House hopefuls are campaigning Sunday, the day the Justice Department is expected to release key findings from special counsel Robert Mueller's confidential report on the Russia investigation.

Vermont Sen. Bernie Sanders continues his California swing with a trip to San Francisco.

Massachusetts Sen. Elizabeth Warren and former Colorado Gov. John Hickenlooper are wrapping up campaign trips to New Hampshire.

California Sen. Kamala Harris is attending a church service before speaking at a rally in Atlanta at Morehouse College.