WaPo:

The fight in New Hampshire is one of at least a dozen legal skirmishes being waged across the country, in the run-up to the 2020 election, that are financed by Democrats and liberal activists who hope to overturn or head off measures they fear could erode the electoral might of young voters — an increasingly left-leaning voting bloc.

Over the past decade, Republicans in more than a dozen states have tried to limit the kinds of student IDs that can be used at the polls, restricted the number of polling locations on or near college campuses, or gerrymandered political boundaries that divide campuses and dilute the power of student voters, as well as other measures.

Among the states with laws that Democrats fear could hamper the youth vote in 2020 are battlegrounds including Wisconsin, Florida and New Hampshire.

Republicans say the rules are meant to prevent fraud and safeguard the integrity of elections, and they deny accusations that they are trying to make it harder for young people to vote.

But there is little doubt that Democrats had more to gain when young voters engaged in recent elections. Voters under 30 turned out in record numbers last fall, helping to power a liberal wave that swept Democrats into power in Congress.