With Republicans expected to make gains in congressional races across the country Tuesday, four vulnerable Virginia Democrats are fighting to avoid being swept away by a GOP wave.... In the Fairfax-based 11th District, Rep. Gerald E. Connolly (D) is trying to fend off Oakton businessman Keith Fimian (R). In the 5th District, Rep. Tom Perriello (D) welcomed President Obama to Charlottesville Friday for his uphill race against state Sen. Robert Hurt (R). In the Hampton Roads region, Rep. Glenn Nye (D) is struggling to hold on to the 2nd District seat against auto dealer Scott Rigell (R). And in Southwest...