I hate Trump, but this framing is disingenuous. In the context of what he was saying, he was trying to make “a point” about South American countries sending criminals to the USA. He was claiming that if he doesn’t win the election, it would be safer to have their next conversation in Venezuela because there would be no crime there as they’d have sent all criminals to USA.
So, you know, just more of his really stupid bullshit, but he wasn’t really saying he would flee to Venezuela. For one, that would require him to believe he had done something wrong or to admit some kind of defeat, two things that I firmly believe he is incapable of doing.