US Representative Justin Amash, a frequent critic of President Donald Trump, on Saturday became the first Republican lawmaker to say the president has engaged in impeachable behavior.Special Counsel Robert Mueller’s report on the investigation into Russian interference in the 2016 election reveals that Trump “engaged in specific actions and a pattern of behavior that meet the threshold for impeachment,” Amash, who has signaled he would consider running as a libertarian against Trump in the 2020 election, wrote on Twitter. Mueller’s report “identifies multiple examples of conduct satisfying all the elements of obstruction of justice, and undoubtedly any person who is not the president of the United States would be indicted based on such evidence,” Amash wrote.Trump has said Mueller’s report concluded there no obstruction of justice. Mueller’s report made no formal finding on that question, leaving the matter up to Congress. Amash also wrote that “it is clear” that Attorney General William Barr intended to mislead the public about Mueller’s report in his conclusions and congressional testimony about it.In his letter to Congress, Barr said he and his deputy Rod Rosenstein determined there was insufficient evidence to establish that the president committed criminal obstruction of justice, or acted unlawfully to impede the investigation. Amash’s comments echoed the conclusions of many Democrats. House Speaker Nancy Pelosi said on May 8 that Trump was moving closer to impeachment with his efforts to thwart congressional subpoenas and obstruct lawmakers’ efforts to oversee his administration.