Mitt Romney has tapped a longtime adviser to begin his search for a vice presidential candidate.

Romney said Monday that Beth Myers is in charge of "selection and vetting and analysis."

"I have selected someone who has been a counselor of mine for a number of years, Beth Myers.

She was my chief of staff when I was governor," Romney said during an interview with Diane Sawyer of ABC News outside Fenway Park in Boston.

Romney is moving forward as the presumptive Republican presidential nominee after rival Rick Santorum suspended his campaign last week.

Myers was Romney's chief of staff when he was Massachusetts governor. She currently is a senior adviser on his presidential campaign...