In a news conference Tuesday, President Barack Obama called Republican nominee Donald Trump “woefully unprepared” for the presidency. 

While “unprepared” is a matter of opinion, “unconventional” may not be. Most observers in either party agree that Trump has made the kind of statements — or picked the kind of fights — that politicians have routinely tried to avoid. Some of his unusual moves: 

1. Attacked a Gold Star Family

Khizr Khan, the father of fallen Army Captain Humayun Khan, called Trump out for failing to understand the constitution and not knowing what it truly means to make sacrifices. Trump told the New York Times, "I'd like to hear his wife say something."

He then suggested, "Maybe she wasn't allowed to have anything to say, you tell me."

Despite a bipartisan backlash, Trump refused to back down, saying he was being "viciously attacked” by the Khans.

2. Offending Latinos — A Fast-Growing Demographic Group

During his speech declaring his candidacy for president, Trump decided to explain why the “U.S. has become a dumping ground.”

He told the crowd, “When Mexico sends its people, they're not sending their best. They're not sending you. They're not sending you. They're sending people that have lots of problems, and they're bringing those problems with us. They're bringing drugs. They're bringing crime. They're rapists.”

3. Trump Blamed The Black Lives Matter Movement For Police Deaths

While many other politicians have tried to express concern about both the deaths of young black men at the hands of police and the safety of law enforcement officers, Donald Trump has denounced the Black Lives Matter movement. Speaking to Bill O’Reilly on Fox News, Trump said the group is looking for trouble.

He also slammed Democrats for supporting the movement, a decision he said would come back to haunt them.

4. Trump Rejected US Alliances with Europe

Although he said he would like to keep America’s NATO alliance, Trump revealed that if he becomes president he may loosen ties with Europe. Trump complained that some of the NATO nations have not been making payments to the U.S.

“I would be absolutely prepared to tell those countries, ‘Congratulations, you will be defending yourself, ’” he said.

5. Uncensored Social Media Comments

On Twitter and other social media platforms, the Republican nominee has slammed his GOP primary rivals, members of the media, and of course his Democratic opponent, Hillary Clinton.  He also referred to Sen. Elizabeth Warren, who is part Native American, as "Pocohontas."