further correction:
As was usual in California at the time, both Nixon and Voorhis cross-filed in the other party's primary, a practice Voorhis had long adopted. Winning both primaries virtually assured election. Each candidate won his own party's primary, with Voorhis garnering a considerable number of votes in the Republican primary, and outpolling Nixon by 7,000 votes overall. Nixon gained momentum, however, when the newspapers pointed out that Voorhis's total percentage of the vote had decreased from 60% in 1944 to 53.5%.[44]
http://en.wikipedia.org/wiki/Jerry_Voorhis

Correction, not the Primary but the General election:
Voorhis advocated the purchase by the Federal Government of the stock in the Federal Reserve Banks, which was held by the member banks, as a way of financing government expenditures and briefly got President Roosevelt to support the measure until the President's advisers caused Roosevelt to change his mind.[27] Voorhis later allied with future House Banking Committee chairman Wright Patman to force Federal Reserve Banks to pay most of the interest they earned on federal securities to the U.S. Government, rather than to the bank stockholders.[28] http://en.wikipedia.org/wiki/Jerry_Voorhis

I heard that Nixon answered a want ad by Prescott Bush to primary
for the House of Representatives in 1946 against the last opponent of the Federal Reserve.

Did Pres. Eisenhower change his opinion of Sen. Kennedy after JFK actually became president?