Many Super Tuesday states with primaries have early voting that have been going on for weeks. In California for example, about 25% of voters are expected to vote early.
Hillary has averaged about a 15 point lead in California polls while early voting was going on.
So that means just to tie the state, assuming the early votes reflect the overall polls- Obama has to win by five points on election day with the 75% of voters that cast a ballot then.
Vote Early, Vote Often, Vote Hillary!