The Indiana Democratic Party leaked some fascinating polling results to political insiders this week. We’ll tell you what it all means in a second, but first here’s the write-up from Dan Parker’s leakee — Chris Cillizza of the Washington Post.

Polling conducted for the Indiana Democratic Party suggests that Sen. Evan Bayh (D) remains extremely popular in the Hoosier State despite criticism from the liberal left over his stance on health care. The poll, which was conducted in 20 competitive legislative districts across the state, showed that 63 percent of Indiana voters approved of the job Bayh is doing while 31 percent disapproved — including a solid 55 percent job approval score among critical independent voters. Those numbers were far stronger than President Obama’s job approval numbers in the 20 districts (48 fav/51 unfav). A memo on the poll obtained by the Fix touts Bayh’s “enviable support for a Democrat in some of the most competitive areas of Indiana.” Given those poll numbers and Bayh’s massive campaign warchest — nearly $13 million in the bank — it’s hard to see how the Indiana Democrat loses.

Brain Howey expanded on it to say 80% of Democrats and 54% of Republicans approve of Bayh. Here are our thoughts.

1. It’s not every day a state party releases a poll showing the majority of Hoosiers disapprove of the job their president is doing. But Bayh and his puppet Parker (Clinton supporters, you’ll recall) did exactly that. It supports what we already believed to be true: Hoosiers understandably wanted a change in 2008. But now that they are seeing what that change actually entails, they are turning the other way.

2. Those Obama numbers should be doubly concerning for Democrats considering where the poll was taken. Cillizza says 20 of the most competitive House districts. Those districts are located in places like Tippecanoe, Madison, Vigo, Vanderburgh, and Marion Counties. In 2008, Obama won those counties by 12, 7, 16, 2, and 28 percent respectively. Now, a majority of voters in those counties disapprove.

3. Equally fascinating is the fall of Evan Bayh. You may not remember, but Hamilton Campaigns polled Bayh just six months ago. This from May 1.

Indiana Democratic Chairman Dan Parker also released a Hamilton Campaign poll that revealed Bayh’s favorable/unfavorable rating was 74/23 percent, including 89 percent among Democrats and 61 percent among Republicans. It also showed that 73 percent gave Bayh a positive job rating.

President Obama’s job rating was 61/36 percent and his personal rating was also 61 percent.

So  in the past six months, despite not having to take a serious vote on any of the most controversial issues out there, Bayh’s approval rating fell 9 percentage points among Democrats, 6 points among Republicans and 10 points overall. That’s before any candidate has spent a dime going after him.

Obama’s drop over the same period was 13%.

All bad signs for Hoosier Democrats.