That's not a significant number. 19% might seem like a lot, but he didn't pick up a single state. If he had, then he might have been a serious contender. A serious contender is someone who "has a serious chance of winning". Ross Perot never had a chance of winning, and thus, was never a serious contender. He got closer than most to being a serious contender, but still didn't cross that line. He was projected to lose by double digits by literally every pollster and odds maker.