DES MOINES — The White House’s task force on the nation’s COVID-19 pandemic response is asking Iowa to take cues from other states that have enacted more aggressive mitigation strategies, which the task force says have helped slow the virus’ spread.The latest task force report, dated last Sunday, says that “in states with aggressive mitigation, we are beginning to see the impact of that mitigation despite the cooling weather.”The report contrasts that with many areas of the country where “mitigation efforts are inadequate or too recently implemented to see a significant impact.”COVID-19 has been spreading exponentially in Iowa recently, leading to record cases, hospitalizations and deaths.