Target's same-store sales rise by 7% in Q1 as digital sales double

Since its fiscal first quarter began in early February, Target's same-store sales have risen more than 7%. The gain, which compares with an increase of 1.5% in the fiscal fourth quarter, is the result of a doubling of its online sales, partially offset by declines inside its nearly 1,900 brick-and-mortar stores. CNBC's Becky Quick reports.