"Generally, there is a reason most justices are drawn from federal appeals courts, said John Malcolm, director of the Edwin Meese III Center for Legal and Judicial Studies at The Heritage Foundation.
“Federal appeals court judges have written more legal opinions about matters that are likely to go before the Supreme Court, while state supreme court justices have ruled mostly on state law and not federal law,” Malcolm, a former deputy assistant attorney general, told The Daily Signal."
http://dailysignal.com/2017/01/13/heres-a-look-at-the-potential-short-list-for-trumps-supreme-court-nominees/
“Federal appeals court judges have written more legal opinions about matters that are likely to go before the Supreme Court, while state supreme court justices have ruled mostly on state law and not federal law,” Malcolm, a former deputy assistant attorney general, told The Daily Signal."
http://dailysignal.com/2017/01/13/heres-a-look-at-the-potential-short-list-for-trumps-supreme-court-nominees/