USA sends on average 3.8 billion a year in aid to Israel. Israel also has a lobbying system in the US to skew public opinion in favor of Israel (the most prominent groups are CUFI and AIPAC), where in certain divisions, Mossad bots spew Israeli propaganda on fake accounts (much like the Kremlin bots).
The government always touts Israel as "our best ally". Not to mention that USA always has unequivocal support to Israel, even if they might criticise them for a couple things. Funny how they support the oppressed while also supporting the aggressor.