Oil gains ahead of U.S.-China trade deal, snapping four-day declines

LONDON (Reuters) - Oil prices rose above $64.50 a barrel on Tuesday, snapping four straight days of declines on easing Mideast tensions as the United States and China, the world's top energy consumers, prepared to sign a preliminary trade deal.Brent crude gained 43 cents, or 0.67%, at $64.63 per barrel by 1036 GMT. U.S. West Texas Intermediate crude futures rose 32 cents or 0.4% at $58.40 a barrel.The outlook for oil demand was supported ahead of the signing at the White House on Wednesday of..