I read this,
It’s not the first time Biden has voiced this Trump-is-terrible-but-Republicans-are-OK sentiment.
And I find this sentence structure almost always is that "... not the first time" connects verb present perfect tense but with some exceptions,
I want to say this is not the first time I represented a witness in a criminal case.
Is this a mistake? Or who can explain it to me why it should be perfect tense behind "be not the first time"?