Nearly a year after Russian government hackers meddled in the 2016 U.S. election, researchers at cybersecurity firm Trend Micro zeroed in on a new sign of trouble: a group of suspect websites. The sites mimicked a portal for U.S. senators and their staffs. Emails to Senate users urged them to reset their passwords — an apparent attempt to steal them. The attempt to infiltrate the Senate network and others reported recently point to Russia’s continued efforts to interfere in U.S.