As I remarked earlier this month, Elvis Costello was lined up to appear at Hillary Clinton's 60th birthday party at New York's Beacon Theater. Costello rounded off the evening with a toe-curlingly, unctuous rendition of "Happy Birthday":
Back in 1987, when a UK General Election was called by Thatcher, Billy Bragg phoned Costello to ask for his involvement in the Red Wedge campaign. Costello declined to assist, saying that it was a bad idea, presumably on the grounds that acts shouldn't align themselves with party political organisations. He's certainly changed his tune.