Freedom Partners Action Fund, a super PAC propped up by conservative activists Charles and David Koch, Tuesday plunked down $1 million for a new 30-second ad denouncing former Democratic Sen. Evan Bayh in front of Indiana voters.  

The commercial, tagged “Bailout Bayh,” assails the two-term lawmaker — who recently launched a comeback bid  for his old seat — for supporting the 2008 bailout of financial institutions and later serving on the board of some of those same beneficiaries.

[

Democrats to Go on Air Monday With Ads Supporting Bayh

]  

“Evan Bayh has a long track record of putting himself and special interests ahead of Indiana families, and supporting the Wall Street bailout is just the beginning,” the super PAC’s spokesman Bill Riggs said in a prepared statement.  

The Koch-backed splurge comes one day after the Democratic Senatorial Campaign Committee began airing pro-Bayh spots in the Hoosier State.  

[

Ratings Change: Indiana Senate Race Now Tilts Democratic

]  

Bayh, who left Congress in 2010, charged back into the spotlight earlier this month after deciding to run for the Senate again. Former Rep. Baron Hill, the Democratic nominee, subsequently shuttered his cash-strapped campaign, clearing the way for Bayh to face off against Indiana Republican Rep. Todd Young.  

Incumbent GOP Sen. Dan Coats made public his plans to retire in early 2015.