What concern related to voter registration has prompted Democrats to take action?

The concern related to voter registration that has led Democrats to take action is the issue of declining voter registration rates. This decline poses a significant threat to electoral participation, which can ultimately affect election outcomes. When fewer people are registered to vote, especially in demographics that traditionally lean towards Democratic candidates, it undermines the party's efforts to mobilize supporters and increase voter turnout on Election Day. Recognizing the importance of a robust voter registration process, Democrats have historically worked to implement measures aimed at increasing access to registration, promoting awareness, and facilitating the voting process to ensure that more citizens can participate in the democratic process.