Lieutenant Governor Timothy P. Murray, who had been raising money and laying the groundwork for a run for governor but faced tough political questions, said Friday that he will not seek the corner office in 2014.

“As I contemplate the commitment required over the next 20 months (and the following four years as Governor) and weigh that against my obligations and responsibilities to my young family, I have decided that I will not be a candidate for Governor in the 2014 election cycle,” he said in an e-mail to supporters. “Nor will I be a candidate for any other statewide office in 2014.”