The Democratic Party’s voter registration advantage has seen a dip in three key battleground states, namely Pennsylvania, North Carolina, and Nevada. This shift could potentially pose a challenge for Vice President Kamala Harris in the upcoming elections. What Happened: The shift is attributed to a lack of enthusiasm for the Biden administration and the Democratic Party in general. In contrast, Republicans have significantly increased their voter registration advantage in Arizona, another key battleground state, reported The Hill. Analysts attribute the drop in Democratic voter registration in…