American Confidence in Elections Act or the ACE Act This bill addresses election administration and security, campaign finance, and other related provisions. Among other provisions, the bill reduces certain election assistance payments for states and local jurisdictions that allow noncitizens to vote in state and local elections, establishes certain requirements related to election and political mail, prohibits foreign nationals from making contributions or donations in connection with state or local ballot initiatives or referenda, repeals certain limits on coordinated party expenditures and aggregate contributions by individuals, terminates the Presidential Election Campaign Fund and requires remaining funds to be transferred to the 10-Year Pediatric Research Initiative Fund, and prohibits the use of federal funds to establish a Disinformation Governance Board.