[ad_1] The threat from President Donald Trump to his vice president, Mike Pence, was clear and direct: If you defy my effort to overturn the 2020 election by certifying the results, your future in Republican politics is over. “Mike, this is a political career killer if you do this,” Mr. Donald Trump told Mr. Pence by phone on the morning of Jan. 6, 2021, according to the White House valet who was with the president for much of the day and told Congress he had overheard the conversation. The testimony…