President Obama waves after signing the Affordable Care Act at the White House on March 23, 2010. Chip Somodevilla/Getty Images hide caption

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Chief Justice John Roberts, shown in 2010, is still "finding his role as chief justice," says one law professor. Paul J. Richards/AFP/Getty Images hide caption

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Pastor Warren H. Stewart of First Institutional Baptist Church in Phoenix joins other clergy members to demonstrate against SB 1070. John Rose/NPR hide caption

itoggle caption John Rose/NPR