Republicans are criticizing the Obama administration’s new leniency for some illegal immigrants as a politically motivated and possibly illegal effort to win over Hispanic voters.

The Republicans contend the new rules — which will prevent deportations for as many as 800,000 illegal immigrants brought to the United States as children — circumvent the law just to buy Obama support from Hispanics ahead of November’s elections, in which the Hispanic vote will likely be crucial.

Rep. Lamar Smith (R-Texas), chairman of the House Judiciary Committee, said the change marks “a breach of faith with the American people.”

“This huge policy shift has horrible consequences for unemployed Americans looking for jobs and violates President Obama’s oath to uphold the laws of this land,” Smith said in a statement.