The Democratic senator opposed the Gulf War because Saddam Hussein is no Hitler, and the control of Kuwaiti oil was not a cause worth dying for.
The senator was a Democrat who did not support the Gulf War. 
mnli hypothesis: The senator was a Democrat who did not support the Gulf War.  premise: The Democratic senator opposed the Gulf War because Saddam Hussein is no Hitler, and the control of Kuwaiti oil was not a cause worth dying for.