Facebook stock plunged by as much as 24 percent in after-hours trading on Wednesday, due to alarm over the social media giant's quarterly report. The company has faced stiff criticism over the Cambridge Analytica data scandal, and executives warned that its revenue growth would slow and its expenses would rise.

The company had said it would face higher costs as it addressed concerns over the handling of user data. Total expenses jumped to $7.4 billion, a 50 percent increase over a year earlier. The diving share price reduced Facebook's market capitalization by about $150 billion in less than two hours, Quartz reports. Harold Maass

President Trump tried some new material out on Twitter Sunday, profanely twisting the name of one of his loudest critics, Rep. Adam Schiff (D-Calif.).

"So funny to see little Adam Schitt (D-CA) talking about the fact that Acting Attorney General Matt Whitaker was not approved by the Senate, but not mentioning the fact that Bob Mueller (who is highly conflicted) was not approved by the Senate!" Trump tweeted. Schiff, the ranking member of the House Intelligence Committee, responded with a tweet of his own: "Wow, Mr. President, that's a good one. Was that like your answers to Mr. Mueller's questions, or did you write this one yourself?"

Special Counsel Robert Mueller was appointed by Deputy Attorney General Rod Rosenstein last year, and did not require Senate confirmation. Schiff and others have argued that Whitaker's appointment was unconstitutional because he wasn't confirmed by the Senate, and never held a position in the Department of Justice that required Senate confirmation. Before accepting the position, Whitaker was a vocal opponent of Mueller's investigation into Russian meddling during the 2016 presidential election. Trump's legal team has been working on answering questions from Mueller, and on Friday, Trump claimed to have responded "very easily" to them.

Should Trump decide to backtrack from the tweet and insist that he misspelled Schiff's name on accident, it would only be his second biggest blunder of the weekend: on Saturday, while touring the fire-ravaged town of Paradise, California, he referred to it as "Pleasure," twice. Catherine Garcia

On Sunday, Democratic Sen. Bill Nelson of Florida conceded his re-election bid to Republican Rick Scott, the state's current governor.

Nelson spent four decades in politics, starting in the Florida state House, then going to space on the Space Shuttle Columbia as a congressman in 1986 before being elected to the U.S. Senate in 2000. Scott lead Nelson by about 12,000 votes after ballots were first counted, a margin so close that it triggered a mandatory recount. After a second machine recount was finished, a manual recount was ordered late last week, and by that time Scott's lead had dropped slightly to 10,033. There were almost 8.2 million votes cast.

This was the most expensive Senate race in Florida history, the Miami Herald reports, with Scott spending more than $50 million of his own money on his campaign. Catherine Garcia

"I think the evidence is overwhelming" that Saudi Crown Prince Mohammed bin Salman (MBS) ordered the murder of U.S.-based Saudi journalist Jamal Khashoggi at the Saudi consulate in Istanbul, Sen. Rand Paul (R-Ky.) said on Face the Nation Sunday. "I don't think we can sweep this under the rug."

Paul reiterated his push to end U.S. arms sales to the Saudi government in retaliation for Khashoggi's killing, decrying the administration's plan to sanction other parties involved. "I think sanctions are pretending to do something without really doing anything," the senator said.

"Most of these people [being sanctioned] are in prison, other than the crown prince," Paul continued. "We need to punish who ordered this, who's in charge. ... If the president wants to act strongly, he should cut off the arm sales" over Khashoggi and because of civilian deaths in the U.S.-supported, Saudi-led intervention in Yemen's civil war.

President Trump continues to express skepticism that MBS is implicated in Khashoggi's death, and he suggested in an interview airing on Fox Sunday he might keep a close alliance with the Saudi prince even if he is guilty of the journalist's murder. He has repeatedly resisted calls to end weapons deals with Riyadh, claiming the economic toll on the United States would be too high.

Watch Paul's comments in context below. Bonnie Kristian

President Trump discussed possible changes among his top staff, the killing of Saudi journalist Jamal Khashoggi, and more in a Fox News Sunday interview with Chris Wallace set to air at 2 p.m. and 7 p.m. Eastern.

"I have three or four or five positions that I'm thinking about [changing]," Trump said of his Cabinet lineup. "Of that, maybe it's going to end up being two. But I need flexibility." He suggested dissatisfaction with Homeland Security Secretary Kirstjen Nielsen in particular.

On Khashoggi's death, Trump maintained his skepticism despite Friday's report that the CIA has concluded Saudi Crown Prince Mohammed bin Salman (MBS) ordered the murder. Even if MBS lied to his face, Trump said, "I want to stick with an ally that in many ways has been very good." After all, Trump mused, "Who could really know [whether MBS lied]? But I can say this, he's got many people now that say he had no knowledge."

And asked by Wallace to grade his own presidency, Trump gave himself an A+ and inquired if a better mark is possible. "Look, I hate to do it, but I will do it," he said. "I would give myself an A+. Is that enough? Can I go higher than that?" Watch that clip below. Bonnie Kristian

Rain is forecast for areas affected by California's deadly Camp Fire in the coming week, with mixed effects anticipated.

The water may help contain the wildfire, which has claimed 76 lives and burned more than 100,000 acres. However, areas already burned lack live plant cover on uneven ground. "It'll bring much-needed relief to the firefighters and to the air quality," Patrick Burke of the National Weather Service told Reuters, "but there's a potential for dangerous mudslides wherever vegetation is burned away on slopes and hills."

More than 1,000 people are listed as missing in connection to the fire, but authorities say that list may contain duplicate names. Some of those listed as missing have called the police to say they are not in any danger, and the total missing count is expected to shrink as further information becomes available. Bonnie Kristian

Some of the Central American migrants traveling by caravan across Mexico toward the United States have reached the border city of Tijuana and stalled, uncertain of their next steps. Many have already been denied entry to the U.S. and are considering their alternatives, like accepting Mexico's offer of jobs and basic resettlement assistance.

"If we had work, we would stay. This has been very tiring," Orbelina Orellana, a mother from Honduras, told Reuters. "I cry a lot to not be able to feed them as I’d like," she said of her three children. "I just want an opportunity."

Complicating the decision is a newly hostile attitude toward migrants in Tijuana, which now has a conservative mayor who has argued "human rights should be reserved for righteous humans," a category from which he excludes the caravan migrants. Some Tijuana residents have scuffled with the migrants and plan to rally against their presence in the city Sunday. Bonnie Kristian