A panel of experts told Congress that, even with perfectly executed public-private partnerships, the federal government still needs to provide its own support -- especially for projects, like transit lines, that aren't guaranteed to generate toll revenue for profit-seeking investors.
Acting on the behest of Congressional Republicans opposed to high-speed rail, earlier this month Transportation Secretary Chao delayed a $647 million grant for Caltrain electrification, throwing its future in doubt. It looks like Republicans in other states were watching and learning.
Chao gave a tight-lipped performance that didn't reveal much about how she would use the regulatory and approval power at her disposal, but here are three instances where you can try to read the tea leaves.
Chao was secretary of labor under George W. Bush and is married to Senate Majority Leader Mitch McConnell. An official announcement is expected shortly.