The White House on Friday defended chief of staff Reince Priebus against accusations he breached a government firewall when he asked FBI Director James Comey to publicly dispute media reports that Trump campaign advisers had been frequently in touch with Russian intelligence agents. President Donald Trump’s spokesman, Sean Spicer, argued Priebus had little choice but to seek Comey’s assistance in rebutting what Spicer said were inaccurate reports about contacts during last year’s presidential campaign.