By Phil Franz-Warkentin Glacier FarmMedia | MarketsFarm — The Canadian dollar was weaker Tuesday morning, with losses in crude oil accounting for some of the selling pressure in the energy-linked currency. At 9:20 a.m. CDT the Canadian dollar was trading at US$0.7322 or US$1=C$1.3657, which compares with Monday’s close of US$0.7348 or US$1=C$1.3609. Crude