Grain futures moved modestly higher Friday as fears of a budget impasse in Washington continued to create uncertainty in commodity markets. On the Chicago Board of Trade, corn was up 2 1/4 to up 3 3/4, soybeans were up 4 to up 5 3/4, wheat up 4 1/2 to up 6 1/2 and oats were up 1/4 to up 4 1/4....