What to know now:

1. Dylann Roof motion: Lawyers for the man accused of killing nine people at a church in South Carolina last year have filed a legal challenge to the U.S. death penalty. Dylann Roof's attorneys argued that the punishment is unconstitutional, saying in a motion, "This Court should rule that the federal death penalty constitutes a legally prohibited, arbitrary, cruel and unusual punishment prohibited by both the Fifth and Eighth Amendments." Attorney General Loretta Lynch announced in May that the Justice Department would be seeking the death penalty against Roof. In the trial that is set to start in January, Roof faces charges of  murder and hate crimes for targeting his victims on the basis of race.

2. Election already rigged: Donald Trump told those attending a rally in Ohio Monday that he believes the outcome of the presidential election in November has already been "rigged." The Republican nominee for president said during the speech that the fact that Vermont Sen. Bernie Sanders endorsed primary rival Hilary Clinton is evidence that the outcome of the election has already been decided.  "I'm afraid the election's going to be rigged. I have to be honest."

3. Galaxy Note7 debut: Set your watches – or any number of other electronic devices – for 11 a.m. ET as that is the time Samsung will premier its Galaxy Note7. The debut of the "phablet" will take place in New York City Tuesday morning. If you are dying to know all about it, but can't make it to NYC, there are live-streaming options for watching the rollout – something a Galaxy Note7 would probably be good for.

4. Douglas released from prison: Cameron Douglas, the son of actor Michael Douglas, has been released from prison after serving nearly seven years on drug charges. Douglas, 37, was arrested in a Drug Enforcement Administration sting in 2009. He was accused of distributing  "multiple pounds" of methamphetamine. He will be living in a halfway house for a time, according to some reports.

5. Kesha suit:  Kesha has dropped a lawsuit filed in California charging her producer, Dr. Luke with sexual abuse. The singer's attorney, Daniel Petrocelli, said the reason his client filed to dismiss the charges in California was to focus on the lawsuit she filed against Dr. Luke – whose  real name is Lukasz Gottwald – in New York. Gottwald has denied he sexually abused the singer.

And one  more

Tuesday communities around the country will celebrate National Night Out. The event, which had its beginnings in 1985,  encourages people to come outside of their homes and meet neighbors and their city's police officers. According to organizers, about 16,500 communities have registered for this year's campaign.

In case you missed it

More than 1.5 million people have seen this video of employees giving back to their boss.