When Floridians overwhelmingly approved a measure allowing most felons to vote after completing their sentences, many expected Democrats to benefit most from the participation of up to 1.4 million newly eligible voters in this year’s election.

But the coronavirus pandemic, which has hampered registration drives, and a disputed requirement that felons pay a series of costs before their rights are restored have turned the anticipated geyser of new voters in the largest swing state into a trickle.