Democrats were projected to take control of both chambers of Congress, and Donald Trump told The New York Times he accepted the results and expected to work with Democrats.

Despite the dramatic outcome, Election Day was largely uneventful, with relatively few disruptions or immediate legal challenges, according to David Becker of the Center for Election Innovation and Research.

The main disruptions were logistical: flooding in Florida forced officials in seven counties to move more than 20 polling places, while a software problem in Westchester County, New York, affected about 250,000 ballots that were set aside for later counting.

Fulton County, Georgia, warned voters about false text messages claiming polling places had changed, and Sen. Susan Collins’ Biddeford office was vandalized before she lost her Maine race to Troy Jackson.

A judge restricted the role of law-enforcement personnel among the administration’s planned 1,000 poll monitors, requiring them to be unarmed, out of uniform and without arrest authority; no major polling-place incidents were reported.

Several administration actions that could have affected voting were blocked, including the Supreme Court’s rejection of a demand to set aside 20,000 California ballots cast by voters suspected of being non-citizens and its decision to block new mail-voting restrictions.

Election experts warned that further legal challenges could target certification of Democratic victories or allege fraudulent voting, while the League of Women Voters criticized the administration’s attempts to interfere with voting.

The main unresolved race was Alaska’s Senate contest, where federal prosecutors are investigating how independent candidate Daniel J. Sullivan, whose name closely resembles Republican incumbent Dan Sullivan’s, entered the race; the Justice Department has issued more than 100 subpoenas but has not said whether a crime occurred.

A federal judge dismissed the Justice Department’s effort to prevent certification of Alaska’s Senate winner if Dan Sullivan lost, and the department appealed; Democrat Mary Peltola said the result could take time.