Hope is to designate Lake Erie as impaired to boost algae fight.
Postcards hope to convince president to take action.
Several groups call out agency’s failure to act to save waterway.
Mayor wants stronger federal oversight of the lake.
Pressure by federal officials six years ago to save the ailing Chesapeake Bay has prompted 11 federal agencies to invest $2.84 billion into that ecosystem, including $515 million last year and $487 million this year. That effort has generated some