Third, despite dismal poll numbers, Trump enters the contest with a job approval rating that is certainly at least marginally better than what the current national polls would suggest. Throughout the 2016 election, most analysts tracked the national polling, which failed to capture Trump's strength in key battleground states. Current surveys continue to understate his support. Many national polls survey all eligible voters, rather than registered or likely voters, which can underestimate Trump, and some voters may be reluctant to admit that they are pro-Trump at all. Add to that the fact that Trump effectively demonstrated during the 2016 campaign that he is capable of expanding his support by effectively demonizing his opponents.