We support a two-state solution in which a safe and secure State of Israel will reside next to a safe, secure, viable, and contiguous State of Palestine.

:-/

References to apartheid seem to focus on South Africa in retrospect. The closest they come to invoking Israel is:

The heavy militarization of the West Bank, reminiscent of the military occupation of Namibia by apartheid South Africa.

Which is bolder than I'd expect any US Senator to be, but far less controversial than Jimmy Carter's stance.