If one thing became clear on Election Day, it was that Americans were eager to vote.

They turned out in huge numbers on Tuesday, capping off a tumultuous, monthslong midterm campaign marked by racial division, bitter disputes over immigration and two episodes of domestic terrorism, including one that left 11 people dead at a Pittsburgh synagogue.

Turnout was significantly higher this year than in the 2014 midterm elections, when Republicans made sweeping gains in the House and Senate during President Barack Obama’s final term. The number of voters was up by double-digit percentages in some counties even before all votes were counted.

But the demographic breakdown of those who voted was not clear on Tuesday night, and it was impossible to say yet whether, as voting rights advocates feared, restrictive voting laws in some states had deterred African-American and Hispanic voters.

The increases appeared to happen across the board, in both Democratic- and Republican-leaning counties. In Florida, with 98 percent of precincts reporting statewide, turnout in Duval and Pasco Counties — both Republican — was up by 38 percent and 29 percent over 2014. In Broward and Hillsborough Counties, both Democratic, turnout was up by 30 and 35 percent.