The White House yesterday nominated Dick Lobo, president and chief executive of Tampa PBS station WEDU-Ch. 3, to head the International Broadcasting Bureau. The federal bureau runs Voice of America and two other broadcasts aimed at Cuba, Radio and TV Marti. Lobo, 73, still must be confirmed by the Senate. Lobo recently retired after seven years heading the Tampa station and 23 in commercial TV. He had worked in overseas broadcasting earlier; President Clinton appointed him head of USIA’s Office of Cuba Broadcasting in 1994. Lobo’s wife, Caren, supervised Florida fundraising for Barack Obama during the 2008 presidential election.