The latest polls all show the Scottish independence campaign losing ground.
The nuclear weapons system is a red-line issue for the nationalist grassroots.
Aside from his own preservation, any hint that he would depart would aid the Yes campaign.
The claim that the only divide that matters is between the rich and the poor ignores the unequal distribution of political power.
A strong performance by Farage's party could signal to Scotland that England may vote to leave the EU in a future in/out referendum.
Scottish First Minister says the ties between Scotland and England "are based instead on links of family and friendship that are facts of geography, not acts of parliament."
The former PM retains a strong connection with the working class Scots who could determine the referendum result.
The latest TNS survey suggests that the race is not narrowing at the rate the nationalists need to win.
The more radical the Yes campaign’s message becomes, the more likely it is to triumph in September.