Calling Donald Trump's Wednesday
foreign policy speech, "unnerving" and "pathetic," South Carolina Sen. Lindsey Graham on Wednesday said Trump's speech proves his unfitness for commander in chief.
"Thank God he wasn't president during the Cold War. This is isolationism," Graham said in an interview on WABC Radio's "Election Central with Rita Cosby."
"I don't want to go it alone" fighting radical Islam, but the United States should have Arab allies in the region, Graham told Cosby.
"This is worse than [President Barack] Obama," Graham said. Obama is seen in the Middle East as being an unreliable partner, he said, but added, "I think the entire world is going to look at Donald Trump as a guy who doesn't understand the role of America."
Graham, who ended his own presidential bid in December, has pushed for the United States to have a bigger role in the fight against the Islamic State (ISIS) in Iraq and Syria, but Trump has been more dovish.
"I will never send our finest into battle unless necessary, and I mean absolutely necessary," Trump said Wednesday. "I will only do so if we have a plan for victory with a capital V. Our goal is peace and prosperity and not war and destruction."
Trump "has no understanding of the world and the role we play," Graham told Cosby.
"This speech was unnerving, it was pathetic in its content, and it was scary in terms of its construct," he said. "If you had any doubt that Donald Trump is not fit to be commander in chief, this speech should've removed it. It took every problem and fear I have with Donald Trump and put in on steroids.
"Ronald Reagan is rolling over in his grave after this speech," he said.
Graham also had a grave prediction for GOP hopes in November if Trump is the party's nominee.
"He will get absolutely annihilated," by Democrat Hillary Clinton, he said. "We are going to get killed if he is the nominee."