These are the headlines you Need2Know:
* **Trump Threatens Iran on Twitter:**
President Trump lashed out against Iranian President Hassan Rouhani late Sunday, warning him -- in an all-caps [tweet](https://twitter.com/realDonaldTrump/status/1021234525626609666) -- to "never, ever threaten the United States again or you will suffer the consequences the likes of which few throughout history have ever suffered before." His tweet comes in response to Rouhani's warning to Trump that "war with Iran is the mother of all wars." Read the details on [NPR.](https://www.npr.org/2018/07/23/631454795/trump-to-irans-president-never-ever-threaten-the-u-s-again)
* **Deadly Shooting in Toronto:**
Two people died and a dozen others were wounded in Toronto after a shooter opened fire in a popular neighborhood late Sunday. Neither of the victims has been identified. Authorities say the gunman is also dead, and they are now investigating the motive behind the shooting. Read the latest on [CNN.](https://www.cnn.com/2018/07/22/americas/toronto-restaurant-shooting/index.html)
* **Mourning Boat Accident Victims:**
The 17 victims of the duck boat accident in Missouri were remembered in a service on Sunday near the site of the accident. The memorial came as federal investigators are examining the boat's black box and video footage. Read more at [CBS News.](https://www.cbsnews.com/news/branson-community-mourns-missouri-duck-boat-victims-today-2018-07-22/)
* **Italian Wins the British Open:**
Francesco Molinari claimed the Claret Jug on Sunday, becoming the first Italian to win a major. He outlasted Tiger Woods, Jordan Spieth, Rory McIlroy and others to secure the prize. Read more at [BBC.](https://www.bbc.com/sport/golf/44918313)
Cheddar's Hope King gets into the latest.
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Former Texas Republican Congressman Will Hurd announced he is running for president.
The Supreme Court ruled that a man convicted to 27 years in prison on gun charges won't be able to challenge his conviction.
A Florida judge has struck down a ruling that banned Medicaid payments for transgender healthcare in the state.
A Moscow court on Thursday ruled that Wall Street Journal reporter Evan Gershkovich must remain in jail on espionage charges until at least late August, rejecting the American journalist’s appeal to be released.
The Supreme Court ruled against the Navajo Nation on Thursday in a dispute involving water from the drought-stricken Colorado River.
A resolution to impeach President Joe Biden is likely to face a House vote this week as House Speaker Kevin McCarthy remains opposed to it right now.
Supreme Court Justice Samuel Alito accepted a 2008 trip to a luxury fishing lodge in Alaska from two wealthy Republican donors, one of whom repeatedly had interests before the court, and he did not disclose the trips on his financial disclosure for that year, ProPublica reports.
President Joe Biden made his first public comments about his son Hunter Biden's plea deal with federal prosecutors on two misdemeanor tax charges. This follows several critical comments by Republicans, who blasted the agreement as a "sweetheart deal."
A federal judge struck down Arkansas' first-in-the-nation ban on gender-affirming care for children as unconstitutional Tuesday, the first ruling to overturn such a prohibition as a growing number of Republican-led states adopt similar restrictions.
Climate change is on trial in Montana. In a landmark case, 16 young people are suing the state over effects like smoke, heat, and drought. It's just the first in a series of cases intended to pressure lawmakers into taking action on the environment. Here with more is Cheddar News Senior Reporter Chloe Aiello.
