Romans Chapter 9 is referred to as the chapter on predestination.  But it is more than that.  Predestination is to be found throughout scripture in its entirety.  Here we see some very specific concepts that we can deal with today.  Although Paul left the Jews who rejected Christ but still preached to all Jews in the synagogues until they either accepted Him or rejected Him.  Election in this case is personal, not national (Israel).  This answers some questions that we all have today.