WASHINGTON (AP) — U.S. home prices rose at a healthy clip in April, though the increase slowed a bit from the previous two months. Home prices jumped 12.9 percent in Seattle, 9.3 percent in Portland and 8.4 percent in Dallas. "Since demand is exceeding supply and financing is available, there is nothing right now to keep prices from going up," David Blitzer, chairman of the index committee at S&P Dow Jones indices, said.