The Wall Street Journal notes that:

The last three statements from the policy-setting Federal Open Market Committee-issued on Jan. 28, March 18 and April 29-all were unanimous

But ... the last three meetings may prove to be the calm before the storm

  • Lacker could dissent if the Fed doesn't raise rates next week. He said last month he hadn't decided if he'd vote for a rate increase at the upcoming meeting, but he previously signaled he favored a move at the June meeting.
    "I expect that, unless incoming economic reports diverge substantially from projections, the case for raising rates will remain strong at the June meeting," Mr. Lacker said in April.
  • Mr. Evans, on the other hand, could dissent if the Fed does raise rates. He said last week he doesn't think the Fed should act until 2016. ... "The hurdle is pretty high for raising rates at the moment," Mr. Evans said.

More at the (ungated) article, here

The next FOMC meeting is not far off (June 16 and 17) ... with the policy decision to be announced June 17