Jan 7 (Reuters) - Canada's main stock index opened

higher on Tuesday, lifted by mining shares, with investors

awaiting key U.S. and domestic economic data as well as

political changes after Prime Minister Justin Trudeau announced

his plan to resign.

At 9:35 a.m. ET (1435 GMT), the Toronto Stock Exchange's

S&P/TSX composite index was up 0.74% or 183.9 points

at 25,183.69.