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WASHINGTON (AP) - Republican Donald Trump plans Monday to further address the deadliest shooting in modern U.S. history in a campaign speech originally intended to attack the presumptive Democratic nominee, Hillary Clinton.

The switch comes a day after Trump called for Clinton to drop out of the race for president if she didn't use the words "radical Islam" to describe the Florida nightclub massacre.

A gunman wielding an assault-style rifle and handgun opened fire inside a crowded gay nightclub in Orlando early Sunday, killing at least 50 people before dying in a gunfight with police. More than 50 more people were wounded, many in critical condition.

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