The 21st district is just one of three in South Florida that national Democrats are targeting heavily this year. They are also high on businesswoman Annette Taddeo (D), who is challenging Rep. Ileana Ros-Lehtinen (R), and Dade County Democratic Chairman Joe Garcia, who is running against Rep. Mario Diaz-Balart (R), Lincoln Diaz-Balarts brother.
Martinez and Garcia have been making the rounds in Denver during the Democratic National Convention this week.
Rep. Elijah Cummings, D-Md., right, hugs Harold Schaitberger, General President of the International Association of Fire Fighters, after the Congressman spoke at the IAFF's Legislative Conference General Session at the Hyatt Regency on Capitol Hill, March 9, 2015. The day featured addresses by members of Congress and Vice President Joe Biden.