That “shifting” was, in fact, the proper counting of mail-in ballots, as Ed Kilgore explained in an extensive New York magazine rebuttal of fraud complaints related to California’s 2018 midterm elections. “We were only down 26 seats the night of the election and three weeks later, we lost basically every California race,” then-House Speaker Rep. Paul D. Ryan (R) said at the time. A 2015 legal change had given voters more time with their mail-in ballots, which needed to be postmarked by Election Day and received by elections authorities up to three days later — as opposed to arriving by Election Day.
Source: Washington Post September 18, 2021 18:00 UTC