The dicussion is about Zionism. Out of so many political parties in Israel (today 32+), 3/4 of them support the State of Israel, thus they are Zionists. Those parties range politically from left to center to right. Only Marxist, Arab parties and some ultra religious sects are against. That demonstates that Zionism has nothing to do with a particular political ideology. There are Zionists socialists, there are Zionists capitalists, there are Zionists religious, there are Zionists secular, there are poor Zionists, there are rich Zionists.
Most of US presidents support Israel within securable borders, therefore, Carter is a Zionist, Obama is a Zionist, Reagan is a Zionist, Bush is a Zionist. Putin is a Zionist too. He even brought his whole family to Israel in 1990's for a vacation.