The CityClub entertained those attending its annual meeting by convening a panel of three regional political leaders who disagree on some major issues: Seattle Mayor Mike McGinn, Bellevue Mayor Don Davidson and King County Executive Dow Constantine.

Constantine, Davidson and a couple members of the audience took issue with McGinn's position that the state should revisit its design of the 520 bridge. McGinn wants to build light-rail lanes into the bridge.

"I've been an active booster of getting moving," said Constantine.

McGinn acknowledged the criticism he hears about leaders rehashing decisions that have already been made.

"I'm apparently the revisiter-in-chief," he joked.

But he said the reason transportation decisions are so often made and remade is because regional elected leaders are out of sync with the public.

"The public in this city loves transit, and we can't seem to give it to them," he said.

Seattle is expecting results of a $250,000 study on the bridge's design this week.

McGinn put Constantine and Davidson on the spot when he declared that he "absolutely" supports a state income tax.

The mayor said sales-tax increases state lawmakers are considering are regressive, and a state income tax would be a fairer way to raise revenue.

Constantine agreed -- though he was not as enthusiastic as McGinn. An income tax might be "appropriate," he said, "as part of a comprehensive state tax reform."

Davidson doesn't support any kind of tax increase, he said.