Mike Allen at The Politico: 
Seeking to bolster the sluggish economy, President Barack Obama is using a Labor Day appearance in Milwaukee to announce he will ask Congress for $50 billion to kick off a new infrastructure plan designed to expand and renew the nation’s roads, railways and runways.
The goals, according to the White House: “Rebuild 150,000 miles of roads â€” renewing our commitment to the backbone of our transportation system … . Construct and maintain 4,000 miles of rail â€” enough to go coast-to-coast … . Rehabilitate or reconstruct 150 miles of runway â€” while putting in place a NextGen system that will reduce travel time and delays.”
I usually have doubts about him but in this case, John Boehner gets it right for a change:
“If we’ve learned anything from the past 18 months, it’s that we can’t spend our way to prosperity. We don’t need more government ‘stimulus’ spending – we need to end Washington Democrats’ out-of-control spending spree, stop their tax hikes, and create jobs by eliminating the job-killing uncertainty that is hampering our small businesses”
I don’t think this has a chance in hell of passage. The Democrats in Congress are running scared. They know full well that another round of spending is going to make the bloodbath this November even worse for Democrats. Frankly, either the White House knows it and is tossing it up so as to mollify their base or they don’t know it and are there by so seriously out of touch as to deserve forcible removal from office. My money is on this being the former. That said, I wouldn’t put the latter past them, either.
Look; no matter what the white house doesn’t this point they’re not going to be able to do anything about our current economic situation. … 10% unemployment. Actually, they could, but their own political narrow mindedness won’t let them cut spending and taxes and get government out of the business of our daily lives. The options they have thereby left to them, will be no more effective than what they have offered up so far. Moreover, we are talking about a time period of something under 55 days between now and the next election. The economy is simply not going to improve on that amount of time. they seek congressional Democrats running away from the Democrat White House as never before. I will point out that it has been since March or April that we’ve seen any congressional democrats standing up for Obamacare.
Thereby, the White House feel they must do something to campaign on. They’re in panic mode. It’s a measure of how much trouble they are in, that this is what they offer up.
If the Republicans are smart at this point, and I consider that to be an open question, the proposal being offered by the White House is being picked apart for sound bites for use in the midterm election advertisements.
(edit and addendum 14:20)