Are Political Contributions Ultra Vires?

It’s been three years, but the Supreme Court’s decision in Citizens United v. Federal Election Comm’n, 558 US 50 (2010) continues to foment a fierce debate about corporate political spending.  In February, Representative Adam Schiff of California introduced a resolution, H.J. Res. 31,  to amend the Constitution as follows: Nothing in this Constitution shall be construed to forbid Congress