7 things to know now: Wisconsin primary; New York debate; petition to arrest Trump

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

What to know now:

1. Wisconsin primary: Democrats and Republicans will be going to the polls Tuesday to vote in Wisconsin's presidential primaries. According to a Realpolitics.com average poll, Texas Sen. Ted Cruz on the GOP side and Vermont Sen. Bernie Sanders on the Democratic side are ahead of their rivals  in the state.

2. Nova wins it all: The NCAA men's basketball championship certainly did not disappoint Monday night. After the lead changed hands throughout the game, Villanova went up on North Carolina in the final minutes. The Tar Heels fought back to tie the game on a three-point bucket with a minute left, only to see Villanova drive the ball down the court to hit a buzzer-beating shot to clinch the championship, 77-74.

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3. Election investigation:  The U.S. Department of Justice in investigating last month's  presidential nominating contest in Arizona's most populous county – Maricopa. The department is looking into claims of long lines at polling places that serve large numbers of   minority voters.

4, Helicopter crash: Five people were killed Monday when a sightseeing helicopter crashed in the  Tennessee mountains. "There was not much left of the helicopter," said  Pigeon Forge Police Chief Jack Baldwin. "There's just a small piece of the tailwing and that's about what's left of the helicopter." Witnesses reported hearing explosions prior to the crash.

5. The debate is on: Watch out, Brooklyn,  Hillary and Bernie are coming to town. The Democratic candidates for president will participate in a debate on April 14 in Brooklyn. The two camps had gone back and forth for the last few weeks on if and when they would debate prior to the New York primary which is April 19.

And one more

More than 100, 000 people have signed a petition proposing that Donald Trump be arrested for inciting violence at this campaign rallies. The White House decided not to move forward on the petition made through a White House petition request site.

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In anticipation of The Masters. Eat your heart out Tiger Woods.