'The Alternative Is Hillary Clinton': Trump Says RNC Is About Uniting the GOP

Chaos on Convention Floor as Anti-Trump Delegates Denied Roll Call Vote

Pence: 'Trump Understands the American People Like No Leader Since Reagan'

Pat Smith, the mother of Benghazi victim Sean Smith, said at the Republican National Convention tonight that she blames Hillary Clinton for her son's death.

Smith said that the last time she spoke to her son was the day before the 2012 terror attack. He told her that security had inexplicably been pulled from the U.S. embassy in Benghazi, Libya, on then-Secretary of State Clinton's watch.

The next day, Smith and three other Americans were killed by radical Islamists.

"We lost four brave Americans who made the ultimate sacrifice for the country they chose to serve," Smith said.

"For all of this loss, for all of this grief, for all of the cynicism the tragedy in Benghazi has wrought upon America, I blame Hillary Clinton. I blame Hillary Clinton personally for the death of my son."

Watch some of Smith's emotional speech above.

'Delicate Snowflake' Students Protest Cops Staying on Campus for RNC

Luntz Lays Out What Trump Needs to Accomplish at the RNC

WATCH: Trump's Latest Ad Features 'Crooked Hillary' as a Wild Pokémon

Manafort on #NeverTrump Movement's Demise: 'We Crushed Them'