Election Day arrives after a surge in early voting, with observers keeping close watch at the polls

The final day of midterm voting arrives Tuesday

Early voting turnout is on pace to exceed the last midterm elections two years ago

Voting so far has unfolded with relatively few problems

Trump's Justice and Homeland Security departments conducted a predawn operation in California leading to more than two dozen arrests of alleged noncitizen voters

Over the weekend: Heavy rains and flash flooding hit parts of Colorado, Arizona and New Mexico · Less than two months ago: The Supreme Court rejected Trump's attempt to limit mail balloting through Postal Service changes · A week before Election Day: Trump gave a qualified answer when asked if he would accept the results · Monday night: The Supreme Court rejected the administration's push to set aside California ballots · Tuesday: Final day of voting in the midterm elections begins, with first polls opening at 6 a.m. in several states

Election law experts said Trump's legal arguments were unlikely to convince the courts, implying outcomes remain undecided