On 18 December 2003 Donaldson, Norah Beare MLA and Arlene Foster announced their resignation from the UUP and on 5 January 2004 they announced that they had joined the Democratic Unionist Party (DUP).
Senior negotiators from Northern Ireland (NI), including Martin McGuinness from Sinn Féin, currently Deputy First Minister of NI, Jeffrey Donaldson from the Democratic Unionist Party (DUP).
Jeffrey Sachs | Jeffrey Archer | Lou Donaldson | Michael Jeffrey Shapiro | Jeffrey Steele | Jeffrey Lewis | Jeffrey Hunter | Jeffrey Katzenberg | Jeffrey Osborne | Jeffrey Dahmer | Stuart Alexander Donaldson | Richard Jeffrey | Julia Donaldson | Jeffrey Tambor | Jeffrey Sweet | Jeffrey Loria | Jeffrey Kramer | Glenn Donaldson | Sam Donaldson | Jeffrey White | Jeffrey Vallance | Jeffrey Steingarten | Jeffrey Richter | Jeffrey Kahane | Jeffrey Hornaday | Jeffrey Hatcher | Jeffrey Ching | Gordon Donaldson | Walter Donaldson | Stuart Donaldson |