President Macapagal Arroyo To Run in Congress ?

I just heard in the NEWS yesterday that Madamme President Macapagal Arroyo finally declares that she will run for Congress in Pampanga and Randy David have already step down in his bid for Congress, In my opinion one who have gained already the highest position in the Government should not run for another position but to help the country as an ambassador like what President Ramos did , and Corazon Aquino did. A person can still help the Government even not in office.
But I think President Macapagal Arroyo is targeting the position of majority speaker of the house.