caller id:  DIST OF COLUMBIA 202 223 7800.  This is the 3rd reminder call in 2 days about the International Economic Development Council leadership summit in 2017.  When the first call came in, the information was recorded and passed to to the executive.  The 2nd call was for different exec and the details were verified and passed on.  Today, the 3rd call came in and the telemarketer - calling on behalf of a respected organization - was rude.  She was overly aggressive and refused to state what company she works for.  She ended the call by hanging up.