[A. Pole]

The executive branch has a duty to enforce the law. Hastert's point was an attempt to cover up corruption. Being Speaker of the House, he fully understands the protections afforded the legislative branch; protection from felony investigation isn't one of them.

To get into Congress you have to do so many complicated steps, collect so many funds, and do so many favors, that the chance that you can be charged with crime is close to 100% even if you an honest person.

Once executive branch has ability to freely scrutinize Congress with prosecutorial tools, the balance of power is broken. And it does not mean that the executive branch is pure as the snow.

[NittanyLion]

Once executive branch has ability to freely scrutinize Congress with prosecutorial tools, the balance of power is broken. And it does not mean that the executive branch is pure as the snow.

Look, the executive branch isn't able to simply go raid legislative offices. It first needs to obtain concurrence from the judicial branch in the form of a search warrant. In this way, there remains a balance of power.

It seems you continue to miss this point.