Can We Please Stop Saying Trump's Base Is Immovable?

I must say I'm getting a bit annoyed with the repeated claim that Trump's base of support is absolutely solid--can't be moved. This contention gets people depressed, but it shouldn't for the simple reason it's not true. Sure, Trump's approval rating is still pretty high among Republicans and people who voted for him in 2016, but for chrissake what do people expect? This is a  polarized country; he's not going to suddenly have a 30 percent approval rating among partisans of his own party.

But he is losing ground. He is losing support among the very kind of voters you would describe as his base and that's very important. He (and the GOP) need every vote they can get and when solid supporters start drifting off that's very bad for them.

Data from a recent Pew release show this drift very clearly. Since February, he's lost 8 points in approval among Republican identifiers/leaners (from 84 to 76 percent), 17 points among white evangelical Protestants (from 78 to 61 percent) and 10 points among white noncollege voters (from 56 to 46 percent).

So can people please stop spreading this myth of Trump's invulnerability? He's a weak president and getting weaker, including among his own supporters.