MADISON, Wis. — For the second time in a month, a liberal veterans group is responding to a million-dollar advertising push targeting Democratic Sen. Tammy Baldwin. said Friday it was spending $1 million on a new ad to run statewide on television and digitally through the end of March defending Baldwin. That comes in the wake of a $1.6 million attack ad released Tuesday from the conservative group Concerned Veterans for America.

Both ads deal with Baldwin's response to reports of over-prescription of opioids and other drugs at the veterans hospital in Tomah that led to three deaths. Baldwin critics have tried to blame her for the deaths. She sponsored a bill signed into law changing the way opioids are handed out at veterans facilities.

Baldwin is up for re-election in November.