In North Carolina, early voting was cut by seven days. In Kansas, 22,000 people were stopped from registering to vote because they lacked proof of citizenship. And in Texas, Democrats say the country’s toughest voter ID law contributed to a one-term congressman’s losing a tight race to his Republican rival.

After an Election Day that featured a wave of new voting restrictions across the country, data and details about who cast a ballot are being picked over to see if tighter rules swayed the outcomes of any races or contributed to the lowest voter turnout in 72 years.

Since 2011, a dozen Republican-led states have passed strict voter ID requirements, some blocked by courts, measures that Republicans describe as needed to increase confidence in elections and critics call the modern equivalent of a poll tax, intended to suppress turnout by Democratic voters.

Few are arguing that the laws drastically affected the overall results in a year that produced sweeping Republican victories, or that they were the dominant factor in voter participation. Although some Democrats claim the new laws may have swung close elections this month, voting experts caution that it is too soon to tell.