This Quinnipiac University poll was conducted from April 20-24, 2018 among 1,193 registered voters. The margin of sampling error is ±3.4 percentage points for the full sample; it is larger for subgroups.
Less than twelve hundred people do not represent the whole nation. This is the lie of statistics.
American voters of different partisan stripes don’t agree on much nowadays, but they can agree on this: most of them approve of US Ambassador to the United Nations Nikki Haley.