U.S. intelligence agencies do not see Russia as capable of using cyberespionage to alter the outcome of Tuesday’s presidential election, but they have warned that Moscow may continue meddling after the voting has ended to sow doubts about the legitimacy of the result, U.S. officials said. The assessment reflects widespread concern among U.S. spy agencies that a months-long campaign by Russia to rattle the mechanisms of American democracy will probably continue after polls close on one of the most polarizing races in recent history, extending and amplifying the political turbulence. U.S. security officials have not ruled out Russian-sponsored disruption on Election Day. In recent weeks, officials at the Department of Homeland Security have collected evidence of apparent Russian “scanning” of state-run databases and computer voting systems. “Whether they were really trying hard to get in, it’s not clear,” a U.S. official said.