New York, Nov. Nov 3 (TIWN) Fears of riots and violent clashes loom over the US as the nation votes in the presidential election on Tuesday after a campaign that deepened the polarisation following months of agitation.

In sign of election eve anxiety, in trendy shopping areas in New York city and elsewhere, rows of high-end businesses were clad in plywood as a precaution against possible rioting and looting that shook the country earlier this year.