By Warren Cornwall Seattle Times Eastside bureau Jennifer Dunn News that Congresswoman Jennifer Dunn might leave the seat she's held through six elections is putting the political ambitions of several Eastsiders in the spotlight. While the Bellevue Republican says she is no longer in the running for a job with an airline lobbying group, reports that she might take the job prompted several people to start positioning themselves for the seat — including King County Councilman Rob McKenna and state Sen. Dino Rossi. Yesterday Dunn confirmed that she's under heavy pressure from her party and the White House to run...