Today, federal prosecutors re-indicted former Illinois Gov. Rod Blagojevich. Why? Prosecutors are reportedly trying to avoid having their case against the ex-governor dismantled by an anticipated U.S. Supreme Court ruling.

In the coming weeks, many observers believe the high court may declare a law key to the original indictment to be unconstitutional. This law is often called the "honest services" fraud law. When this case was argued before the Supreme Court in December, several justices expressed concerns about the law's scope.

Last April, Blagojevich was charged with 17 counts of fraud, racketeering and other criminal activity. Reuters reports:

"The new charges ... are based on the same underlying criminal conduct," said Patrick Fitzgerald, the U.S. Attorney for the Northern District of Illinois, in a court filing accompanying the new grand jury indictment in Chicago.

The Illinois legislature impeached and removed Blagojevich, a Democrat, from office in January 2009, during his second term. He has pleaded not guilty to the charges and is scheduled to go on trial in Chicago in June.