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A kayaker paddles along Zephyr Cove, near the site of the 20th Annual Lake Tahoe Summit in south Lake Tahoe, Nev. President Obama said the environmental challenges of conservation and fighting climate change are inseparably linked.
Rich Pedroncelli/AP
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A sign from the Environmental Protection Agency posted in front of West Calumet Housing Complex houses in East Chicago, Ind.
Tae-Gyun Kim/AP
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U.S. Treasury Jack Lew says a better case needs to be made to U.S. workers who fear the effects of proposed trade deals with Asia and Europe.
Fred Dufour/AFP/Getty Images
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Diane Robertson volunteered for Obama in 2008 and 2012 and is now volunteering for Clinton. She says "voter suppression" is the biggest motivating factor for black voters.
Asma Khalid/NPR
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Chicago Mayor Rahm Emanuel, shown here in January, wants to create a new Civilian Office on Police Accountability to investigate police shootings, allegations of excessive force and other police misconduct.
Chip Somodevilla/Getty Images
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