Her best hope for a pardon will come at the end of President Obama's term. Legally, presidents can issue these at any time, but because of the possible political fallout the majority of them come during the "lame duck" period after an election.

https://www.justice.gov/pardon/gwbush-pardons#nov24-08

https://www.justice.gov/pardon/gwbush-commutations#novone

https://www.justice.gov/pardon/clinton-pardons#november21200...

https://www.justice.gov/pardon/clinton-commutations#novtwo

If you want to encourage Obama to do this, contact information for the White House can be found at https://www.whitehouse.gov/contact/write-or-call