It will not unfold as you suspect. From a sample size of 1006 adults 45% support impeachment, 38% don't and 17% don't know.
Going to the link the study consisted of 412 Democrats, 403 Republicans and 115 independents. The adjusted confidence level is + or - 5.0 points. That means that the number of those supporting impeachment is somewhere between 40-50% and for those against the range is 33-43% What that means is at the extremes the real number could be 50% support/33% against or 43% against/40% support. Or could be any other point in between. But larger surveys cost more money so a lot of limited surveys are done even though they are not very precise because they still give us an idea of what people are thinking if taken with a grain of salt.
39% think there is enough evidence to impeach. 36% don't and 25% are unsure. All of this is split along party lines. 74% of the Democrats support impeachment and 72% support conviction. (That is odd. I would have thought they would be the same.) Only 17% of the Republicans agree.
The respondents had a limited knowledge of the impeachment process. Only 55/56% knew that the impeachment process started in the House and that it doesn't remove the President. Only 33% of the respondents knew that no President has ever been removed from office (Nixon resigned before being impeached. Neither Clinton nor Johnson were convicted.)
Here is a disclaimer from the authors, "Statistical margins of error are not applicable to online non-probability polls. All sample surveys and polls may be subject to other sources of error, including, but not limited to coverage error and measurement error."
So yes on that particular poll 45% supported impeachment and 38% didn't. A similar poll could have very different results and the crazy thing is both are correct. If you hear people complain about the limited size of the poll this is why. And there is nothing subjective in those numbers. They come from statistical calculations.
But none of that matters anyway, especially when a large number of the respondents had no idea how the impeachment process works. There are only 45 Democrats in the Senate. It takes two-thirds of the Senate (67 votes) to convict. That means both of the Independents in the Senate and 20 of the 53 Republican Senators
would have to vote to impeach.
They are going to need a lot stronger evidence before that will happen.