7 things to know now: New Hampshire primary; Manziel's girlfriend; man tosses gator into restaurant

Here's a roundup of news trending across the nation and world today.

What to know now:

1. Primary day: New Hampshire is holding the nation's first primary of the 2016 election season on Tuesday. As candidates still crisscross the state, some of the voting has already been completed. In a state that allows towns of fewer than 100 people to begin voting at midnight, Dixville Notch, Millsfield and Hart's Location have already cast and counted their ballots. The winners in the three small towns? On the Republican side, Ohio Gov. John Kasich. Bernie Sanders pulled off the victory for Democrats.

2. Train wreck: At least eight people were killed in Germany when two trains collided head-on Tuesday morning. More than 150 were injured in the crash in Bavaria. According to The Associated Press, the crash happened in an "inaccessible region," delaying rescue efforts.

3. Clinton reboot: There are rumors that Hillary Clinton will be restructuring her campaign after facing a challenge from Vermont Sen. Bernie Sanders that was tougher than expected. According to reports, some close to the campaign feel the organization was too slow to acknowledge the popularity of Sanders and the threat his campaign poses.

4. Manziel's girlfriend: Colleen Crowley, the former girlfriend of NFL  quarterback Johnny Manziel told police she was slapped and  her life was threatened in an incident with Manziel last month. CNN reported that in an affidavit Crowley said Manziel grabbed her by her hair, restrained her in a hotel room, slapped her ear and threw her in a car. She said at one point Manziel threatened her life as well as his. Manziel has denied hitting Crowley.

5. Widow charged: The widow of a senior Islamic State leader has been charged in federal court with holding American Kayla Mueller hostage and playing a part in her death. According to the Justice Department, Nisreen Assad Ibrahim Bahar, also known as Umm Sayyaf, admitted she and her husband, Abu Sayyaf, kept Mueller captive along with several other young female hostages. According to an FBI affidavit, Mueller was repeatedly raped by ISIS leader Abu Bakr al-Baghdadi when he visited Umm Sayyaf's home. Abu Sayyaf was killed in a U.S. Army Delta Force operation last year.

And one more

A man was arrested and charged with assault after he lobbed a live alligator through a window  at a Wendy's drive-thru in Loxahatchee, Fla. According to the Palm Beach Sheriff's Office, Joshua James  was charged with aggravated assault with a deadly weapon, illegally killing, possessing or capturing an alligator, and second-degree larceny petit theft. According to law enforcement authorities, James placed an order, pulled up to the window to pay, took a drink from the server then tossed the gator – who was about 3 ½ feet long -- through the window and into the restaurant.

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