Players have a great deal of flexibility when conducting diplomatic relations with their allies.
As has been pointed out with Libya, the debate over Libya, sometimes we allow diplomatic relations with imperfect regimes because progress can best be made through engagement instead of isolation.
Divorce: a resumption of diplomatic relations and rectification of boundaries.
President Obama announced that he's going to reopen diplomatic relations with Cuba. He wants to act before Seth Rogen makes a movie about Castro.
I am for free commerce with all nations; political connection with none; and little or no diplomatic establishment
The reason for having diplomatic relations is not to confer a compliment, but to secure a convenience. [On diplomatic recognition of the People's Republic of China]
Euphemisms are unpleasant truths wearing diplomatic cologne.