Trump keeps talking. Migrants keep walking.

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It’s Monday and that means The Short List is back for the week. As we scoured the news for today’s top stories, the one that really caught our attention: A bizarre 'headless chicken monster' swimming deep in the Antarctic Ocean.

Yes, you read that right. Australian researchers found this bizarre creature that looks like a 'headless chicken monster.'

But before we dive into those waters, we first look at the migrant caravan making its way north through Mexico, ongoing questions about Jamal Khashoggi's murder and the upcoming midterm elections.

Swelling migrant caravan marches on

An estimated 5,000 migrants moved north through Mexico Monday on their way to the United States as President Donald Trump lobbed further threats at Central American governments unable to stop the swelling caravan. Calling it a "national emergency," Trump, without evidence, claimed on Twitter that there were "criminals and unknown Middle Easterners" among the refugees fleeing violence and poverty. (An organizer for the caravan, Denis Omar Contreras, denied the claim: “There isn’t a single terrorist here.") Trump wrote that he would follow through on threats to cut off funding for Guatemala, Honduras and El Salvador for letting the caravan clear those countries.

Jamal Khashoggi: Questions still remain for Trump administration

President Trump said Monday that he is "not satisfied" with the response from Saudi Arabia over the killing of journalist Jamal Khashoggi. Trump specifically reacted to Saudi requests to extend the investigation for another month: “There’s no reason for that.”

Meanwhile, Jared Kushner won’t say if he believes the kingdom’s claim that Khashoggi died in a fist-fight that escalated inside the Saudi consulate in Turkey. “Right now as an administration, we’re more in the fact-finding phase,” Kusher said. “Then we’ll determine which facts are credible.”

‘No girl leaves me:’ A Wisconsin man used the Internet to lure young women into relationships. Once he had them, he kept them captive.

Cody Jackson saw himself as invincible. He saw girls as disposable. He manipulated teens and young women across the country into relationships by promising safety, attention and love. Then, he became violent. A four-part series from the Cincinnati Enquirer uncovers how Jackson manipulated women — until the law caught up with him.

Politics make for strange bedfellows: Trump stumps for Cruz

Only two years after President Trump labeled Ted Cruz as ‘Lyin’ Ted’ and Sen. Cruz called candidate Trump a ‘pathological liar,’ the two former rivals are teaming up. Trump went to Houston Monday to stump for embattled incumbent Sen. Cruz. With about two weeks left until the midterm elections, here are the latest stories from our Politics team:

• President Trump's approval rating hits new high as Democratic lead shrinks in tight races

• These Senate races will decide control in Washington

• Unexpected battlegrounds: A look at five key races in unlikely places

• Polls show Sen. Bill Nelson building lead over Gov. Rick Scott in Florida race

• Opinion: Obama endured midterm 'shellackings' as president. Could he help fuel a blue wave now?

If sharks weren't enough to keep you out of the ocean

Beware of the 'headless chicken monster' that was spotted swimming in the Antarctic Ocean. The bizarre creature that actually looks like it's missing a head is really a sea cucumber scientifically known as “Enypniastes eximia.” Australian researchers captured rare footage of the “monster” flapping its veil and appearing to feed or crawl using its tentacles across the ocean floor. Honestly, you have to see this thing for yourself.

'Headlesss chicken monster' found in the depths of the Antarctic A deep-sea swimming sea cucumber, "Enypniastes eximia", has been filmed in the Southern Ocean waters off East Antarctica.

Other top stories you need to know about:

• Activists vow transgender Americans #WontBeErased by Trump administration

A report that the Trump administration is considering a move to rigidly define gender as unchanging and biologically determined at birth was met with outrage and indignation.

• Ex-NFLer Rae Carruth, convicted in murder plot, is freed

Former Carolina Panthers wide receiver Rae Carruth took his first steps as a free man in nearly 19 years, leaving the Sampson Correctional Institution after serving his prison sentence for plotting the death of his pregnant girlfriend.

The Short List is a compilation of stories from across the USA TODAY Network. It was brought to you by editors Ashley Shaffer, Josh Hafner, Mary Bowerman, Cara Richardson and David Carrig.