On the issues:
Foreign policy: Trump claimed last month that he had devised a “foolproof way” to defeat the Islamic State in Iraq and the Levant, but he refused to divulge it, saying he did not “want the enemy to know what I’m doing.” He calls President Obama “one of the worst things that’s ever happened to Israel” and blames him for deteriorating U.S.-Israeli relations. He says Russia is acting aggressively in Ukraine because the United States is “not a respected country and we don’t have respected leadership at this moment” — but says America’s European allies should confront Russia.
Immigration: Trump, whose mother emigrated from Scotland, says illegal immigrants are “destroying the fabric of the country” while the middle class is getting “decimated.” He opposes efforts to grant legal status to undocumented immigrants, calling that a “suicide mission” for Republicans because “every one of those 11 million people will be voting Democratic.” He proposes to build “a real wall” to keep immigrants out.
Same-sex marriage: Trump says that his views on marriage are “evolving” but that he still favors “traditional marriage,” between “a man and a woman.”
Environment: He calls climate change a hoax. He says those who warn of global warming want to raise taxes.
Economy and budget: Trump believes reckless government borrowing and stimulative policies by the Federal Reserve threaten the long-term health of the American economy and undermine the dollar. He strongly opposes the Trans-Pacific Partnership trade deal. He takes particular aim at China, accusing it of currency manipulation and flooding the U.S. with low-cost exports that “are truly hurting our economy and our jobs.”
New York Times