Sure they can, and they will till the Trump bubble likely bursts and "the Donald" has faded away into clownish oblivion.
What will be more interesting is how Trump himself handles it if/when his polling goes south. He is constantly talking about how great his polls are as if those numbers represent currency. If/when the time comes that his polling is consistently not so good, I'm guessing suddenly he won't mention polling and would tell you they don't matter.
Let's be fair here though, hypocrisy in politics....who'd have thunk it! When it comes to polling Trumpkins behave like many/most people - love the polls that show their guy/gal doing well, claim they are nonsense when the same poll shows just the opposite. Remember for months leading into the 2012 election there were all manner of people claiming they could "unskew" polls and that Romney was actually winning.......yeah, that didn't turn out so well. There was an even a laughable website called Unskewed Polls or something that claimed to be able to go in, shift the sample into something they regarded as more fair, and show what the real result should be. That actually fooled a lot of gullible people too.