Obama leads McCain 48-40 in Pew poll
 Among all voters, Democratic Sen. Barack Obama leads Republican Sen. John McCain by 48 to 40 percent, according to a new Pew poll released Thursday.
"Pew polled 2,004 people by land line and cell phone from June 18 to 29. The margin of error is plus or minus 2.5 percentage points," McClatchy newspapers writes.
"The outlook for the presidential election in midyear is substantially different than at comparable points in time in recent campaigns," the survey found.
Among those variables: "Independents make up about one-third of the electorate, and those who have preferences are split virtually evenly between Obama and McCain, with 42 percent for Obama and 41 percent for McCain.
"However, some 46 percent of independents are undecided or only lukewarm toward their current choices. Only 28 percent of them said they'd certainly vote for Obama, while only 26 percent said they were sure to back McCain.
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