Donald Trump: Sarah Palin helped Adele once ... will it work again?
Sarah Palin has given her backing to Donald Trump's Republican presidential bid.
The populist ex-governor of Alaska was the Republican vice-presidential candidate in 2008.
Despite retiring from politics in favour of a media career, she remains an influential conservative voice.
Rajini Vaidyanathan looks at whether Ms Palin will be a help or hindrance to Mr Trump.
Produced by Sarah Holmes; Edited by Bill McKenna
20 Jan 2016