(Bloomberg) -- President Donald Trump may have risked impeachment in an attempt to tar Joe Biden with scandal, but he appears to have accomplished two political goals -- sowing doubts about a leading rival while incurring little damage among his most ardent supporters.Interviews with voters across the country in recent days found few have changed their minds about the president as a result of the Trump-Ukraine scandal.As with previous controversies, Trump’s supporters said they were sure he had done nothing wrong, while his critics said they thought it was obvious that he had. It was Biden who may suffer the most, as even some who support the impeachment inquiry said they now had questions about what Biden’s son, Hunter, did in Ukraine.Robin Wade, 58, of Kenosha, Wisconsin, voted for Trump in 2016 and plans to vote for him again. The former teacher, now on disability, thought Democrats were “making a mockery out of our country” by opening an impeachment inquiry into Trump’s pressuring ...