Despite support from her fellow Republicans and the fact that she did better in Iowa than some of her counterparts, Carly Fiorina was not invited to participate in the ABC News Republican debate on Saturday.

The network said Fiorina did not meet its criteria — namely, she did not finish in the top three in the Iowa caucuses, and is not averaging in the top six in polls nationally and in New Hampshire. There won't be an undercard debate this time around, and Fiorina sent the Republican National Committee a letter asking that it "demand that media executives step aside and let voters hear from all of us." She received support from former Texas Gov. Rick Perry, New Hampshire Sen. Kelly Ayotte, Nebraska Sen. Ben Sasse, and even rival Sen. Ted Cruz (R-Texas), who said she "deserves to be there." Also in her corner is the 2012 Republican nominee, Mitt Romney, who tweeted that Fiorina did better in Iowa than New Jersey Gov. Chris Christie and Ohio Gov. John Kasich, and ABC would be wrong to "exclude" the "only woman" in the field.

In addition to Fiorina, Jim Gilmore was not asked to attend the debate. Invitations were sent to Donald Trump, Cruz, Ben Carson, Sen. Marco Rubio (R-Fla.), Christie, Kasich, and Jeb Bush. Catherine Garcia

On Sunday, Takuma Sato won the 101st Indianapolis 500, beating three-time winner Helio Castroneves by three car lengths in a wild, crash-filled race, with Ed Jones coming in third. Sato, the first Japanese driver to win the Indy 500, is a 40-year-old former Formula One driver who had won just one of his 123 IndyCar races. "Hopefully, the crowd enjoyed it," Sato said "It's beautiful. I dreamed of something like this since I was 12." A number of one-time race leaders were sidelined by seized-up engines and spectacular crashes, the most memorable being Scott Dixon's car being thrown through the air after being by by Jay Howard's car. There was a lot of destruction but no serious injuries in the race. You can watch the Howard-Dixon crash, with ESPN commentary, below. Peter Weber

Defense Secretary James Mattis warned of grave consequences for failure to resolve the United States' differences with North Korea via diplomacy while speaking on CBS Sunday.

"A conflict with North Korea would probably be the worst kind of fighting in most people's lifetimes," Mattis said in a Face the Nation interview. "This regime is a threat to the region, to Japan, to South Korea. And in the event of war, they would bring danger to China and to Russia as well," he added. "But the bottom line is it would be a catastrophic war if this turns into a combat if we're not able to resolve this situation through diplomatic means." Pyonyang claimed to test an anti-aircraft missile Sunday morning, its third weapons test in as many weeks.

In the same conversation, Mattis described pursuing a more aggressive approach to the fight against the Islamic State. "The bottom line is we are going to move in an accelerated and reinforced manner, throw them on their back foot. We have already shifted from attrition tactics where we shove them from one position to another in Iraq and Syria, to annihilation tactics where we surround them," he said. Watch an excerpt of his comments below. Bonnie Kristian

A man named Willie Cory Godbolt confessed Sunday to fatally shooting eight people in three homes in the towns of Brookhaven and Bogue Chitto, Mississippi. Among the dead was a sheriff’s deputy called to investigate after a neighbor reported a disturbance. The identities of the victims have not been released.

"I ain't fit to live, not after what I done," Godbolt confessed to a local paper after he was arrested. "Not in y'all eyes, not in nobody else's eyes." Godbolt said he did not intend to hurt the deputy — "My pain wasn't designed for him. He was just there" — but planned to provoke police into killing him: "Suicide by cop was my intention."

A 16-year-old boy Godbolt took hostage escaped unharmed, and law enforcement are expected to bring charges soon. Godbolt is believed to have been disputing custody of his children when he attacked. Bonnie Kristian

"The times in which we could completely depend on others are on the way out," German Chancellor Angela Merkel said Sunday in Munich in comments understood to reference Europe's reliance on the United States. "I've experienced that in the last few days," she continued. "We Europeans truly have to take our fate into our own hands" and "fight for our own destiny."

When President Trump met with fellow NATO leaders in Brussels on Thursday, he reiterated his critique that allies are too dependent on the United States, calling their failure to make meet a pledged 2 percent of GDP defense spending target unfair to the U.S.

Meanwhile, Defense Secretary James Mattis on Sunday maintained Trump is supportive of the alliance. "I think when President Trump chooses to go to NATO personally and stand there alongside the other more than two dozen nations in NATO, that was his statement, not words, actions," he said in a CBS interview. Bonnie Kristian

British police on Sunday arrested a 25-year-old man in connection to the suicide bombing in Manchester that killed 22 people at an Ariana Grande concert Monday. This is the 14th arrest linked to the attack; 12 people remain in custody.

On Saturday, police released photos of Salman Abedi, the Manchester-born man responsible for the bombing. "We are gathering a detailed picture of Abedi as the investigation develops and now need people to tell us if they have any information about his movement," said an official statement.

British Home Secretary Amber Rudd has also implemented a temporary exclusion order, requiring special vetting for "suspected Islamic terrorists" seeking to return to the U.K. until it is certain Abedi does not have accomplices still on the loose. "The operation is still at full tilt," Rudd said, with about 1,000 people working the case. Bonnie Kristian

The Department of Homeland Security "might" prohibit laptops as carry-on items for all international flights in and out of the United States, Homeland Security Secretary John Kelly said Sunday in an interview with Chris Wallace on Fox News Sunday.

The United States being a "free and open society" is "one of our vulnerabilities," Kelly said. "There's a real threat — numerous threats against aviation. That's really the thing that they're obsessed with, the terrorists: the idea of knocking down an airplane in flight, particularly if it's a U.S. carrier, particularly if it's full of mostly U.S. folks." Electronic carry-ons are already limited for flights from 10 Muslim-majority countries in the Mideast and North Africa.

Kelly also said he would "likely" expand nationwide a new TSA policy of requiring passengers to more substantially unpack their carry-on bags at the checkpoint, separating food and paper items into different bins. A 2015 DHS investigation found TSA officers failed to detect 95 percent of explosives and weapons passed through airport security in an internal test. Terrorism experts say the long lines caused by slow TSA checkpoints are themselves a security risk. Bonnie Kristian

President Trump revisited familiar territory on Twitter Sunday morning, raging against "fake news" and urging his followers to disbelieve any news reports citing unnamed sources.

These posts come just two days after unnamed sources alleged Trump's son-in-law and senior adviser Jared Kushner attempted to arrange backchannel communications between the Trump transition team and the Kremlin, deepening suspicion of election manipulation collusion between the Trump campaign and Russia. Bonnie Kristian