In a new CNN/Opinion Research Corporation survey, 49 per cent of Republicans said that they were "very" or "somewhat likely" to support a run by Mrs Palin, who shot to international prominence in 2008 when she was selected as Senator John McCain's vice-presidential running mate. This is down sharply from the 67 per cent of Republicans who said that they were likely to support a Palin candidacy in 2012 when they were asked in a CNN poll in December 2008. Of her main potential rivals, two thirds of Republicans questioned stated that they were somewhat or very likely to support...