Americans who included Mega Million tickets on their holiday shopping lists have a shot at winning more than $300 million in Tuesday’s drawing, the largest Christmas Day jackpot in the history of the multi-state lottery. The grand prize has grown to $321 million after a nine-week spell without a winner. Combined with a $294 million Powerball jackpot up for grabs on Wednesday, the holiday week could deliver prizes worth more than $600 million.
