(Reuters) - Presumptive Republican nominee Donald Trump has hired several new staff members to expand his campaign for the November election, including Jim Murphy as national political director to focus on key battleground states, his campaign said on Tuesday.

Other new hires listed in a Trump campaign statement included Lucia Castellano as director of human resources, Brad Parscale as the campaign's digital director, and Kevin Kellems as director of surrogates.

(Reporting by Mohammad Zargham in Washington, editing by G Crosse)