Yay I learned how to move a post (had no idea how to do this before!)
They're all bad regardless of the amount and influence extends well beyond money into other areas. Individual dark money rich guys have far more influence than the amount of money you mentioned. Schumer alone has received 7.7 million from AIPAC members, which explains some of his stupid, outdated stances and why he's persona non grata here in New York and why he won't even show his face here anymore and why he needs to be primaried. AIPAC has been known to have undue influence on politicians which causes some very stupid and destructive decisions to be made. In addition to direct influence, they have an outsized dark money influence which involves creating superpacs and shell groups beyond AIPAC. It's too much to get into here, but by doing a little detective work, you learn a lot of very alarming things about dark money influence in politics that just should not be allowed to be there (including the exact amounts going to each politician by groups like AIPAC, API, NRA, PHRMA, ACS, as well as dark money shell groups they created, etc.) that the SCOTUS allowed by the very shortsighted Citizens United decision.
It's why all this pac/superpac crap needs to be illegal as well as limiting all donations to one flat sum (no more than 1000).
Actually even better to only allow for public donations via rigorous campaign finance reform.