At least Schumer is more likely to be loyal to Israel.
Both the Islamonazis AND their 5th column supporters have gone so far over the limit that it's hard for me to understand how any Jew could support what's going on with Iran, Obie's disrespect of Netanyahu, and so on.
I think there is also a separation of powers issue here. Senators of both parties are jealous of their historical and Constitutional powers to haver a veto over treaties.
So self-interest is the best explanation for Chucky's 'good' behavior.