LANSING, Mich. (AP) Republican activists in swing states say they have seen little sign of the teams tasked with knocking on doors and turning out infrequent voters on behalf of Donald Trump , raising concerns about the partys presidential nominee relying on outside groups for an important part of his campaign operations.

Trump and the Republican National Committee he controls opted to share get-out-the-vote duties in key parts of the most competitive states this year with groups such as America PAC, the organization supported by billionaire Elon Musk .

It is difficult to demonstrate that something is not happening. But with fewer than 50 days until the Nov. 5 election, dozens of Republican officials, activists and operatives in Michigan, North Carolina and other battleground states say they have rarely or never witnessed the groups canvassers. In Arizona and Nevada, the Musk-backed political action committee replaced its door-knocking company just this past week.

I havent seen anybody, said Nate Wilkowski, field director for the Republican Party in vote-rich Oakland County, Michigan, which includes crucial Detroit suburbs. He was speaking specifically of America PAC. Nobodys given me a heads-up that theyre around in Oakland County areas.