Barbour, a Republican who once considered running for president, pardoned 198 people before finishing his second term Jan. 10.
Outgoing Mississippi Gov. Haley Barbour says the state parole board had already approved release of 90 percent of the some 200 convicts he pardoned. But a judge blocked 21 of the pardons, citing the state's constitution.
Outgoing Gov. Haley Barbour (R) gave reprieves to 208 inmates, including 14 convicted murderers, prompting Democratic legislators to reintroduce a bill that would curb pardon powers.