The US Postal Service told a judge it could not complete his order to sweep mail processing facilities on Tuesday afternoon for delayed election ballots and immediately dispatch any for delivery in about a dozen states, including closely fought battlegrounds Pennsylvania and Florida. USPS data showed as of Sunday about 300,000 ballots that were received for mail processing did not have scans confirming their delivery to election authorities. While ballots may be delivered without scans, voting rights groups fear mail delays could cause at least some of those votes to be disqualified. US District Judge Emmet Sullivan on Tuesday had ordered the sweep in response to lawsuits by groups and Latino community advocates.