<prompt> Translate the following text to EnglishJoseph Ralston, aliyekuwa rais wa jeshi la Marekani, alishindwa kuwania urais kwa sababu ya uhusiano na mwanamke mwingine wakati alipokuwa ameachana na mkewe.  <response>: Joseph Ralston s candidacy for the chairmanship of the Joint Chiefs of Staff was derailed because he had had a relationship with another woman while separated from his wife. 