PolitiFact

What about Trump’s assertion that Obama fared more poorly? It’s not the case if you use the most applesto-apples comparison: Rasmussen’s own polling at this stage of Obama’s presidency.

Rasmussen’s results for Obama during the same period in June 2009 do not show an approval rating below Trump’s 50 percent. Obama’s approval ratings were between 54 and 58 percent through June 9-16, 2009, and they did not dip below 50 percent until late July of that year.

Gallup’s tracking of Obama’s job performance showed a higher mark of 60 percent approval at that time.

Of course, Obama’s approval rating did dip below the high 50s later in his presidency. Obama’s ratings in the Rasmussen poll consistently fell below 50 percent from the fall of 2009 to the summer of 2012, and again from the summer of 2013 to the spring of 2016.

However, experts caution that it’s most appropriate to compare presidents’ approval ratings at the same point in their presidency. Historically, most presidents have tended to have higher approval ratings early in the “honeymoon” period of their tenure before they sink, as some voters begin to tire of their policies. Trump’s overall polling right now is far below what all past presidents have polled at an equivalent point in their first term.

One reason why Rasmussen has shown higher ratings for Trump stems from its methodology. For one, it polls likely voters.

Registered voters tend to offer higher job approval than surveys of adults more generally. And surveys of likely voters — Rasmussen’s approach — offer higher job approval ratings still.

Meanwhile, polls that use live callers have been showing lower approval ratings than polls conducted by online or automated survey. Rasmussen uses automated surveys. “Automated polls only call landlines, which means they miss the roughly half of the American population that uses mobile phones only,” FiveThirtyEight editor in chief Nate Silver wrote in February.

We reached out to Rasmussen but did not hear back by deadline. Finally, what to make of Trump’s implication that Rasmussen should be more trusted because it was more accurate than other pollsters about the 2016 election?

According to the rundown in RealClearPolitics, Rasmussen was the only pollster to get the popular vote result — a two-point Hillary Clinton win — correct in its final pre-election poll. Two pollsters (Monmouth University and NBC News/Survey Monkey) had Clinton winning by six points; four (ABC News/ Washington Post, CBS News, Fox News, and Economist/ YouGov) had Clinton winning by four; two (Bloomberg and Reuters/Ipsos) had Clinton winning by three; one (IBD/ TIPP) had Trump winning by two; and one had Trump winning by five (Los Angeles Times/USC). However, it’s worth taking this with a grain of salt. First, the polls that had Clinton winning by two or three points were all very close to the mark once margins of error are taken into account. And second, Rasmussen was lucky to have its two-point margin come during the final pre-election poll. During the last week before the election, its daily results were scattered — Clinton by three, tie, tie, Trump by three, tie, and Clinton by two.

Our ruling

Trump said, “The new Rasmussen Poll, one of the most accurate in the 2016 Election, just out with a Trump 50% Approval Rating. That’s higher than O’s #’s!” There’s a grain of truth here: Rasmussen was closest to the mark among pollsters in its final pre-election survey. However, Trump has engaged in some serious cherry-picking. Other polling in this time frame shows approval ratings for Trump that are seven to 11 percentage points below Rasmussen’s finding. And contrary to Trump’s assertion, Obama’s numbers in the same poll at the same point in his presidency were higher than Trump’s current results. We rate the claim Mostly False.