President Trump wants everyone to know he has dirt on his former economic adviser.

During a Fox & Friends interview Thursday morning, host Brian Kilmeade suggested to Trump that Gary Cohn, the former director of the National Economic Council, might have been one of the sources for Bob Woodward's explosive book Fear. Trump responded that he "could very well have been." Cohn is a major player in the Woodward book, which details a White House in chaos: One section describes him stealing documents off the president's desk so he can't sign them.

But Trump took it a step further, suggesting he's got some things he wants to reveal about Cohn himself. "I can tell stories about him like you wouldn't believe," Trump said of Cohn, without elaborating.

Cohn has publicly stated that Woodward's book is not accurate and that he's proud of his time spent in the White House, but the president didn't seem to buy that denial. "But what does that mean?" Trump said of Cohn's statement. He also suggested Cohn never believed in him anyway, saying he never thought Trump would be able to re-negotiate trade deals with Mexico and Canada. Watch Trump's comments below. Brendan Morrow

A nine-year-old girl who is a U.S. citizen says she was "scared" and "completely by myself" while being detained at the border for more than 30 hours.

Thelma Galaxia told NBC San Diego that her two children, 9-year-old Julia Isabel Amparo Medina and 14-year-old Oscar Amparo Medina, were on Monday being driven to school from Tijuana to San Diego by her friend, who told them to walk across the border after being worried that heavy traffic would make them late to school.

But the children were reportedly then detained by U.S. Customs and Border Protection and not reunited with their mother for more than 30 hours. Galaxia says officers told her daughter she didn't look like her passport picture, which was taken when she was younger. They reportedly accused her of lying about her identity and told her she would be released to her mother if she told them she was really her cousin.

Galaxia also says officers made her son sign a document identifying his sister as his cousin. "He was told that he would be taken to jail and they were going to charge him for human trafficking and sex trafficking," she said. The two were finally released when Galaxia called the Mexican consulate after being informed her children had been detained.

U.S. Customs and Border Protection officials told NBC San Diego that the young girl gave them "inconsistent info" and that they detained her so they could "perform due diligence in confirming her identity and citizenship," but they did not explain why this took more than a full day. Read more at NBC San Diego. Brendan Morrow

President Trump is closing out his workweek with — you guessed it — another attack on late Sen. John McCain (R-Ariz.).

Trump in an interview with Fox Business that aired Friday was asked by host Maria Bartiromo about his recent attacks on the Arizona senator, who died of brain cancer last year. "John McCain is dead," Bartiromo said. "Why are you doing this?" Trump used this as an opportunity to tear into McCain once again, saying he gave Christopher Steele's Russia dossier to the FBI for "very evil purposes" and that he "was horrible" for his vote against repealing the Affordable Care Act.

"I'm not a fan," Trump said of McCain.

Trump also insisted, though, that he's not the one bringing up the subject of McCain, saying, "I don't talk about it. People ask me the question. ... You people bring it up. I don't bring it up."

This is despite the fact that Trump originally began attacking McCain on Twitter, going after him in a tweet on Saturday and then again on Sunday, also retweeting a follower who said, "We hated McCain." This is what prompted questions from reporters. Trump also brought up McCain on his own during a speech on Wednesday, during which he went on an anti-McCain rant for several minutes.

Even if Trump were only talking about McCain when asked, though, he could always simply decline to answer these questions, a fact Trump acknowledged during this Friday interview. "I could say 'no comment,'" he said, "but that's not me." Watch Trump's latest exchange about McCain below. Brendan Morrow

Maverick is more than just Charlie's best friend — he's also his "seeing-eye" puppy.

Charlie and Maverick are golden retrievers, both owned by Adam and Chelsea Stipe of Mooresville, North Carolina. Charlie is almost 11 years old, and due to glaucoma, had his left eye removed in 2016 and his right in 2017. He still loves to play and go on walks but sometimes needs a little bit of help getting around. That's where Maverick comes in.

Maverick joined the Stipe family in January. Now four months old, Maverick walks next to Charlie, guiding him where he needs to go. Chelsea Stipe told NBC Philadelphia Maverick also noticed when Charlie would lose track of a toy, and would "pick it up and put it back in front of him to re-engage playtime." It took Charlie a bit of time to get used to Maverick, but now, they're inseparable. "They're both pretty crazy and special," Chelsea Stipe said. "They're definitely our entertainment." Catherine Garcia

At 94 years and 172 days old, Jimmy Carter is now the longest-living U.S. president.

Carter, the 39th president, was born on Oct. 1, 1924. When George H.W. Bush died in November, he was 94 years and 171 days old. Carter was also the first American president born in a hospital.

In office for one term, he has spent the last several decades dedicated to service, building houses with Habitat for Humanity and launching the nonpartisan and nonprofit Carter Center, which focuses on public policy. In 2002, he received the Nobel Prize. Carter announced in 2015 that he had cancer, which started in his liver and spread; he underwent surgery, and is now cancer-free.

Deanna Congileo, a representative of the Carter Center, told NBC News the organization is "grateful" for Carter's "long life of service that has benefited millions of the world's poorest people." Catherine Garcia

National Oceanic and Atmospheric Administration (NOAA) scientists on Thursday said "conditions are primed" for flooding in the Plains and Midwest that "could be worse than anything we have seen in recent years."

Mary Erikson, deputy director of NOAA's National Weather Service, said the "stage is set for record flooding now through May," because river levels are already high, soil moisture is above-normal, and there is substantial snowpack in the northern Plains, The Washington Post reports.

This week, there was deadly flooding in Nebraska and Missouri, and that could be just "a preview" of what might happen this spring. "This is potentially an unprecedented flood season," said Edward Clark, director of NOAA's National Weather Center. "It may become more dire in the coming weeks." The NOAA's spring flood outlook has 200 million Americans at risk, primarily those living near the upper, middle, and lower Mississippi River basins; the Great Lakes; as well as the eastern Missouri, lower Ohio, lower Cumberland, and Tennessee River basins. Catherine Garcia

In one year, Tanitoluwa Adewumi went from not knowing anything about chess to becoming New York's newest champion.

Adewumi, 8, started learning the game last year at his school, P.S. 116 in New York City. Adewumi and his family came to the U.S. from Nigeria two years ago, seeking religious asylum; they are Christians who fled to escape the terror group Boko Haram. Adewumi's coach, Shawn Martinez, said the third-grader loves to play and is always practicing. "He smiled every time he did anything on the board or learned something new," he told NBC New York. "I could just tell this game was for him."

Over the weekend, Adewumi kept his undefeated streak alive, winning his age group in the New York State Primary Chess Tournament. Adewumi will soon have a place to display his huge trophy: The family has been living in a homeless shelter, but a GoFundMe started for them this week has raised more than $160,000, and they will soon move into their own home.

Adewumi is gearing up for the national championship in May, and is inching closer to his goal. "I want to be the youngest grandmaster in the world," he said. Catherine Garcia