DES MOINES, Iowa (AP) — As rising murder rates gain attention in American cities, Republicans have ramped up a misleading campaign to cast Democrats as anti-police and lax on public safety. It’s a message that Republicans believe helped them stave off greater Democratic gains in last year’s elections and one with renewed potency as cities consider cuts to department budgets as part of an effort to revamp policing. It’s not at all clear that the GOP strategy, which stretches back to President Richard Nixon and was used by President Donald Trump, is a winning one. But it may be prominent as Republicans search for ways to gain ground in suburban areas critical to winning control of the U.S. House next year.