HOUSE OVERSIGHT 026276 year," and "politics must play no role in the decisions of federal prosecutors or investigators regarding any investigations. . . . Law enforcement officers and prosecutors may never select the timing of investigative steps or criminal charges for the purpose of affecting any election, or for the purpose of giving an advantage or disadvantage to any candidate or political party." Strong evidence of a crime can overcome this policy, as was the case with the bureau's investigation of Mrs. Clinton's private email server, which began more than a year before the 2016 election. But Crossfire was not a criminal investigation. It was a counterintelligence investigation predicated on the notion that Russia could be colluding with the Trump campaign. There appears to have been no discernible evidence of Trump-Russia collusion at the time Crossfire was launched, further reinforcing the notion that it was initiated "for the purpose" of affecting the presidential election. The chief evidence of collusion is the hacking of the Democratic National Committee's servers. But nothing in the public record suggests the Trump campaign aided that effort. The collusion narrative therefore hinges on the more generic assertion that Russia aimed to help Mr. Trump's election, and that the Trump campaign reciprocated by embracing pro-Russian policies. Yet despite massive surveillance and investigation, there's still no public evidence of any such exchange—only that Russia attempted to sow political discord by undermining Mrs. Clinton and to a lesser extent Mr. Trump. Some members of the Trump team interacted with Russians and advocated dovish policies. But so did numerous American political and academic elites, including many Clinton advisers. Presidential campaigns routinely seek opposition research and interact with foreign powers. The Clinton campaign funded the Steele dossier, whose British author paid Russians to dish anti-Trump dirt. The Podesta