Presidential candidate Hillary Clinton has proposed to invest $275 billion over five years in a broad range of infrastructure projects including highway, rail, sea, air and broadband expansion. Her plan would directly invest $250 billion in projects and would provide $25 billion in seed money to create a National Infrastructure Bank, plus another $225 billion in loans and loan-guarantee programs to encourage investors to back national infrastructure projects.

That is not nearly enough, counters her republican rival Donald Trump, who has vowed to spend double what Clinton has proposed, though he has not yet detailed his spending priorities or mechanisms.

Since the 1980s, various iterations of a National Infrastructure Bank have been proposed to encourage investment in infrastructure projects, according to a report in The Hill. This federally created bank would offer credit assistance to state and local governments as well as private investors in the form of loa