* Rasmussen surveys "likely voters" in their daily approval polls. Others -- particularly partisan pollsters -- poll off a privately maintained voter file. Rasmussen measured him at 42% approval on April 3 while Gallup had Trump's weekly average at 38% as of April 2. Both polls suggest gains for Trump since then; the difference is that Trump started off higher in Rasmussen than in Gallup. The larger point here: No one poll should be taken as the "truth" about where Trump -- or any other politician -- stands.

Source: CNN April 17, 2017 16:07 UTC