Donald Trump, the national front-runner, keeps his big lead in two of the three early states of New Hampshire and South Carolina, but now Texas Sen. Ted Cruz has moved past Trump into a lead of his own in Iowa. Florida Sen. Marco Rubio remains in double digits in New Hampshire and South Carolina, and Governor Chris Christie has now shown upward movement in New Hampshire, doubling his support there in the last month. The backdrop to all this is a mood of anxiety - both economic and personal security - pervading the GOP electorate in these early states. Nine...