FILE - In this July 30, 2013 file photo, U.S. Rep. John Conyers, D-Detroit, speaks at a news conference on Capitol Hill in Washington. On Tuesday, April 29, 2014, Democratic challenger the Rev. Horace... more 
FILE - In this July 30, 2013 file photo, U.S. Rep. John Conyers, D-Detroit, speaks at a news conference on Capitol Hill in Washington. On Tuesday, April 29, 2014, Democratic challenger the Rev. Horace Sheffield III challenged Conyers’ nominating petitions for the Aug. 5 Democratic primary. That followed a WDIV-TV report that two of the petition circulators were not registered to vote at the time that they gathered the signatures. If the petitions are disqualified and Conyers falls short of the 1,000 valid signatures needed, his name would not appear on the ballot. Conyers first was elected to Congress in 1964. (AP Photo/J. Scott Applewhite, File) less 
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Associated Press | Photo By J. Scott Applewhite, File
Tue, Apr 29, 2014 9:21 PM EDT