PHOENIX — Former Sheriff Joe Arpaio, who was spared a possible jail sentence last year when his political ally President Donald Trump pardoned his criminal conviction for disobeying a judge's order, announced Tuesday he plans to run for the U.S. Senate seat now held by Jeff Flake. The 85-year-old lawman tweeted he is seeking the post to support Trump's policies. "President Trump needs my help in the Senate," Arpaio added in an email to supporters seeking funds for the race. Arpaio, who served 24 years as metro Phoenix's sheriff before suffering a crushing 2016 defeat by an little-known Phoenix police sergeant, would face former state Sen.