California Senator Kamala Harris is again formally asking Twitter to suspend President Donald Trump's controversial Twitter account, but the social media platform may be reluctant to do so. In a letter to Twitter CEO Jack Dorsey, the Democratic presidential candidate wrote on her campaign letterhead that the president's constant tweets attacking the whistleblower that ignited an impeachment inquiry violates Twitter's user agreement rules. Harris points out several tweets in the past week that appear to "target, harass, and attempt to out the whistleblower who set forth credible allegations that the President has abused his power by urging a foreign government...