I got the point. Just not the mechanism. It's all very well to hand-waive vaguely toward 'grassroots work', but its far from clear how, under the voting policy in question, this will affect anything.
Let us say our grassroots campaign went really well and we get some great local politicians. Now what?
They advise Kamala (or her replacement) to drop support for genocide? Why would she listen? They're going to be in no different a position to us, they have to vote in her favour no matter what all the while there's a worse person on the ballot.
And why would anyone even advise it in the first place when leftist votes are guaranteed anyway? It'd be political insanity to risk loosing the centrist vote for no gain.
So, explain the mechanism. We get a great local politician and she does what....?