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Vice President Joe Biden in November, while 46 percent favored Romney and Ryan. That's not much changed from a June AP-GfK survey, when the split was 47 percent for the president to 44 percent for Romney.
• At the same time, there's a far wider gap when people were asked who they thought would win. Some 58 percent of adults said they expected Obama to be re-elected, while just 32 percent said they thought he'd be voted out of office.
• After just over a week on the campaign trail, Ryan has a 38 percent favorable rating among adults, while 34 percent see him unfavorably. Among registered voters, his numbers are slightly better -- 40 percent favorable to 34 percent unfavorable. Ryan remains unknown to about a quarter of voters.
• Romney put the 42-year-old conservative chairman of the House Budget Committee on the ticket Aug. 11. The AP-GfK Poll was conducted Aug. 16-20.
• ___

• ELLICOTT CITY, Md. (AP) -- Investigators looking into a deadly train derailment in Maryland were watching videos, studying track conditions and pouring over maintenance records, trying to figure out if two young women sitting on a railroad bridge over the town's main street contributed to the crash or if their presence was just a tragic coincidence.
• So far, investigators have determined the emergency brakes were applied auto

matically -- not by the three-man crew -- on Monday around midnight, but they don't know why the train jumped the tracks. It could be weeks before they know anything definitive.
• Tweets and photos from the two 19-year-old college students chronicled some of their final moments together as they enjoyed a summer night together before they were to headed back to school.
• "Drinking on top of the Ellicott City sign," read one tweet. "Looking down on old ec," read another.
• Accompanying photos showed their view from the bridge and their bare feet, one with painted blue toenails, dangling over the edge. "Levitating," read the tweet.
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