A federal judge dismissed Exxon Mobil Corp.’s attempt to stop the attorneys general of New York and Massachusetts from investigating its alleged fraud regarding what company officials knew about climate change and when. The country’s largest oil company argued that probes by New York Attorney General Eric Schneiderman (D) and Massachusetts Attorney General Maura Healey (D) violated its free speech rights and were improperly motivated by political bias, among other claims.Exxon wanted Judge Valerie Caproni in the District Court for the Southern District of New York to stop the attorneys general from issuing subpoenas or other demands for records or dispositions.But in a big loss for Exxon, Caproni, whom former President Obama nominated to the bench, said the company’s allegations were “implausible,” and dismissed its case.