Are the Orthodox generally conservative?
And are the Reform more likely to be liberal?
In general, yes. Americans support Israel both cause Israelis like us and there are shared values in common. There aren't too many countries that stand with us no matter what. I'll take Israel's support any day over that of France.
And are the Reform more likely to be liberal?
Yes, and yes. Unfortunately, there are more Reform and "Conservative" Jews in the USA than Orthodox, hence the uphill battle that most Pro-Israeli Republicans have in getting the Jewish vote.