Donald Trump suddenly changed his opinion of former President Barack Obama, as some polls showed that presumed Democratic presidential nominee Kamala Harris was improving her position in the 2024 race. On Tuesday, CNN asked Trump about his view of Obama before the former Democratic president was scheduled to speak at his party’s convention in Chicago that night. “I like him. I think he’s a nice gentleman, but he was very, very weak on trade,” Trump replied. “If you take a look at what happened to our country trade-wise, it was a disaster. Take a look at Japan, take a look at China, take a look…