US election 2016: George W Bush campaigns for brother Jeb
Former President George W Bush has hit the campaign trail to boost younger brother Jeb's faltering presidential nomination bid.
He met veterans and appeared at a rally in South Carolina on Monday, ahead of Saturday's primary election.
George W Bush's legacy has come under fierce attack from Republican frontrunner Donald Trump.
Jeb Bush, the former Florida governor, has spent a lot of campaign cash but failed to make an impact.
He is struggling to catch up with Mr Trump and Texas Senator Ted Cruz, who won the New Hampshire and Iowa contests respectively.
Mr Bush's famous family has largely kept out of his presidential nomination battle and he insisted last year that he was running as his own man.
But last week his mother Barbara Bush, wife of former President George HW Bush, spoke out in his support.
And on Saturday, Jeb Bush defended his brother's presidency, saying he had built a "security apparatus to keep us safe".
In a televised debate, billionaire businessman Mr Trump tore into George W Bush's record, accusing him of lying about the reasons for the Iraq War, which he said had destabilised the Middle East.（文本来自BBC）