In an In Depth series this week , CNN explores why gas prices have shot upward again . CNN 's Mark Whitaker : The price of a gallon of regular gasoline has jumped more than 10 cents in the past two weeks to $3.978 per gallon. CNN will also look at how rising tensions with Iran play into energy prices . Also , two critical primaries are coming up Tuesday -- Michigan and Arizona .
In an In Depth series this week , CNN explores why gas prices have shot upward again . CNN 's Mark Whitaker : It 's easy to blame speculators , but are they really the culprits here ? CNN will also look at how rising tensions with Iran play into energy prices . Also , two critical primaries are coming up Tuesday -- Michigan and Arizona .