By Katie Lannan

MediaNews

WASHINGTON, D.C. -- Rep. Niki Tsongas will welcome constituents to Capitol Hill on Wednesday for a daylong seminar with speakers including former Boston Police Commissioner Ed Davis and TV journalist Luke Russert.

Other business and political figures who will present at the 19th Annual Third District Day include Ted Leonsis, a Lowell High School graduate and owner of the Washington Capitals and Washington Wizards; Holly Petraeus, director of servicemember affairs at the Consumer Financial Protection Bureau; and General James Amos, commandant of the U.S. Marine Corps.

The event is intended to engage residents of Tsongas' district with public policy leaders, providing insight on issues facing both the area and the nation as a whole.

"It's open to anybody who wants to come down and see how things work down here," said Michael Hartigan, Tsongas' communications director.

Davis, a Lowell native and former superintendent of the Lowell Police Department, rose to national prominence for his response to last year's bombings at the Boston Marathon finish line. He retired last year and is now a fellow at Harvard University's John F. Kennedy School of Government and a security analyst for WBZ-TV, the CBS affiliate in Boston.

Russert is the Capitol Hill correspondent for NBC News. His father, Tim Russert, was the longest-serving moderator of the political news show Meet the Press, until his death in 2008.

The Third District Day event runs from 8:30 a.m. to 2 p.m. Wednesday, in the Gold Room of the Rayburn House Office Building on Capitol Hill.