This announcement from the White House would seem to indicate
that Rob Portman won't be spending time preparing for a
running-mate announcement:
President George W. Bush today announced the
designation of a Presidential Delegation to Santo Domingo,
Dominican Republic to attend the Inauguration of His Excellency
Leonel Antonio Fernández Reyna, President of the
Dominican Republic, on August 16, 2008.
The Honorable Robert J. Portman, Former
Congressman, United States Trade Representative and Director of the
Office of Management and Budget, will lead the
delegation.