Just a word of caution. In predicting the outcome of the general election, the Party with the most the total votes in the primary season has gone 4-7 in the general in the last 11 elections.
That number would only be meaningful for situations such as we have this year, with both parties both running non-incumbents. The number of total votes during the primary season is totally meaningless for someone running for re-election since obviously the importance of voting for the incumbent would be much reduced during the primaries.
What if you factor out incumbents?