WASHINGTON (AP) — Americans’ confidence in the economy fell this month as gas prices resumed their climb after the U.S. and Iran stepped up their fighting. CONSUMER attitudes had improved modestly in June as gas prices came down to around $3.70 a gallon from more than $4.50 a gallon in late April and early May. The Board said references to gas prices were down slightly but remained elevated. Respondents’ mention of food and grocery prices increased. To navigate those higher prices, Americans have turned to couponing, comparison shopping and cutting back on favorite foods as they absorb the biggest jump in grocery prices in a half-century.