It's not true and it's also politically dumb to say out loud.
Trump's approval has fallen farther in Iowa than any other state, due to the trade war. Polls have Trump only slightly ahead there, barely better than AZ, which we're all chomping at the bit to make a blue state.
If we win the presidency without Iowa, but lose the Senate by one vote, and Mitch blocks all our SCOTUS picks, how will that feel?
But that doesn't mean we should dump on Iowans and write their state off our general election plans.