Instead of the elected nominee Mr Adlai Stevenson choosing his own vicepresidential running mate as on former occasions the selection of a running mate was thrown open to vote and of various competitors Senator Estes Kefauver an exceptionally zealous Zionist received the nomination as vicepresidential candidate

Please fix the punctuation.
Instead of the elected nominee (Mr Adlai Stevenson) choosing his own vice-presidential "running mate" as on former occasions, the selection of a "running mate" was thrown open to vote and of various competitors Senator Estes Kefauver (an exceptionally zealous Zionist) received the nomination as vice-presidential candidate.