By mid-day Thursday, at least seven people were dead with more than 200 injured, in the wake of Tuesday's Amtrak train derailment.
President Obama says his proposal for the year starting October 1 would, if enacted, enhance retirement security and improve worker protections for millions of people.
"Florida already ranks in the bottom half of the nation for energy efficiency, and now will only fall farther behind, costing families and businesses in the process."
Congress left town on August 1 for a month-long recess without tackling a host of U.S. problems - and lack of infrastructure funding is one of those topping the list.
President Obama says more federal spending will help avert a looming crisis that could stifle economic growth and torment commuters.
The differences in commuting times for inner-city minority residents and suburban non-minorities are significant enough to affect minorities' pay and job possibilities.
They hope the campaign will resonate with voters concerned about low incomes, citizens worried about climate change and lawmakers who will respond to pressure on both.
"No worker should have to live off of poverty wages. People should be able to work 40 hours a week and take care of their families off of that."
More than the climate is changing. A packed town hall meeting on climate change and infrastructure needs showed a growing level of concern and unity between labor and the environmental movement.
Leaders of the labor-environmental group Blue-Green Alliance called on the president to launch and prioritize a national dialogue on climate change.