A pledged delegate for Clinton switches his vote to Obama. Great. We got the vote, but what does that mean? There has been talk from the Clinton camp about getting pledged delegates to switch. This could legitimize her position. Methinks the Obama camp would be smart to discourage delegate switching.

Update: Christopher Orr at The Plank weighs in:

But there is, or ought to be, a moral [obligation]. There may be extraordinary cases in which it is reasonable for a pledged delegate to defy the will of the citizens whose votes he's representing, but this isn't one of them. There have been plenty of procedural absurdities that have been brought to light in this year's extended primary. But none come close to comparing with the undemocratic chaos that would ensue if other delegates took their pledges as lightly as Johnson does his.