Presumptive Republican presidential nominee Donald Trump, who frequently criticizes US foreign policy under President Barack Obama and former Secretary of State Hillary Clinton, has praised former Iraqi President Saddam Hussein's ruthlessness. "Saddam Hussein was a bad guy, right? ... But you know what he did well? He killed terrorists. He did that so good," Trump told a campaign rally on Tuesday night in Raleigh, North Carolina. "They didn't read ‘em the rights, they didn't talk. They were a terrorist, it was over." Trump has previously said the world would be "100 percent better" if dictators like Hussein and Libya's Muammar Qaddafi were still in power. Prior to the US invasion, Iraq was listed by the US as a state sponsor of terrorism. Jake Sullivan, a Clinton senior policy adviser, said Trump's "praise for brutal strongmen seemingly knows no bounds." Sullivan said such comments "demonstrate how dangerous he would be as Commander-in-Chief and how unworthy he is of the office he seeks." Trump's foreign policy pronouncements have proved controversial, even within the Republican Party. He has said the United States is too fully engaged around the world and has questioned the role of NATO and said the United States has been taken advantage of by nations benefiting from its security cooperation and troop presence. Some critics within the GOP have said his policies suggest an isolationist stance in an increasingly dangerous world. Sens. John McCain of Arizona and Lindsey Graham of South Carolina, partners among Republican congressional critics of Obama administration foreign policy, carried out a fact-check on Trump's national security statements earlier this year at a Capitol Hill hearing. On April 19, when the Army general selected to lead US forces in South Korea testified before the committee, McCain seized the opportunity to undermine Trump's suggestion that the US withdraw its forces from the South because Seoul isn't paying enough to cover the cost of the American military presence. "Isn't it the fact that it costs us less to have troops stationed in Korea than in the United States, given the contribution the Republic of Korea makes?" McCain asked Gen. Vincent Brooks. Yes, Brooks said, telling McCain the South Koreans pay half, or $808 million annually, of the US presence there. Two days later, Trump's claim that NATO is irrelevant and ill-suited to fight terrorism came under the microscope. As president, Trump has said he would force member nations to increase their contributions, even if that risked breaking up the 28-country alliance. Responding to a series of questions from Graham, Army Gen. Curtis Scaparrotti, selected as top American commander in Europe, assured the committee of NATO's critical importance to the US Breaking up the alliance, Scaparrotti warned, would benefit Russia, Daesh (the self-proclaimed Islamic State) and even the Taliban in Afghanistan In early March, more than 70 conservative national experts, including former Homeland Security Secretary Michael Chertoff, wrote in an open letter that they have disagreed with one another on a variety of issues but are united in their opposition to a Trump presidency. Chertoff served in President George W. Bush's administration. The experts who signed the letter said they planned to work to prevent Trump's election, a stance that suggests there may be a shallow pool of experienced conservative national security professionals willing to join Trump's administration should he win in November. They called Trump "fundamentally dishonest" and said his support for the expanded use of torture against suspected terrorists is inexcusable. They also cited Trump's "hateful, anti-Muslim rhetoric," his admiration for Russian President Vladimir Putin, and his advocacy for waging trade wars, which they say would lead to economic disaster in a globally connected world. The letter was posted on the website War On The Rocks, an online forum for foreign policy and national security commentary. — AP