Both candidates for U.S. Senate in Massachusetts are finishing a frantic day of campaigning ahead of Tuesday's special election to fill the seat vacated by Secretary of State John Kerry.
Veteran Democratic Rep. Ed Markey is running against Republican businessman Gabriel Gomez. But they are struggling to get voters to the polls in a summer election that has yet to capture much attention.
It's hard not to compare Tuesday's special election to the one in 2010.
