The 80-year-old Arizona Republican, undergoing treatment for brain cancer, will be back in Washington for the critical roll call on beginning debate on the legislation, but it remains an uphill battle for Republicans. Trump's son-in-law and adviser will return to Capitol Hill for a closed-door conversation with lawmakers on the House intelligence committee after denying collusion with Russia. The move is designed to defuse a crisis with the Muslim world, including security ally Jordan, the custodian of the holy site. Traffickers have responded to the surge in U.S.