Sen. Elizabeth Warren's bill is co-sponsored by six Democrats plus Sen. Angus King of Maine.
But the 8-5 vote engineered by Democrats will face a challenge in the Legislature and could be vetoed by Gov. Paul LePage.
Increasingly, stores are turning to smartphones and tablets as a more convenient checkout tool.
The Maine Association of Realtors says real estate agents sold 593 homes last month, down from 624 a year ago.
The low mortgage rates spur more home purchases and refinancing, boosting the economy
The developer reassesses the market for the units planned for the India Street neighborhood.
But the four-week average for initial unemployment benefits falls to a five-year low, the government says.