Democratic presidential candidate Michael Bloomberg would seek to standardize federal elections across the United States and prevent states from blocking felons from voting under a plan aimed at expanding access to elections rolled out on Friday. Bloomberg’s plan echoes proposals offered by his Democratic rivals as the party shows a unified front on the issue of combating voter suppression. Voting access is an important issue for the party’s minority voters, who are often seen as targeted by Republican lawmakers. Under the voting rights plan, Bloomberg would seek to create a non-partisan commission that would look to standardize federal elections, including...