Presidential polling from Gallup is coming to an end after nearly nine decades, in a major shift in how one of the country's most well-known survey firms measures public opinion. For years, Gallup has been considered the gold standard for tracking how Americans feel about the president. While the organization says it will pivot toward issue-based polling instead of presidential job approval, other firms are continuing to track the numbers — offering a detailed look at how President Donald Trump is performing across the country.