Outlaw campaigning by an incumbent president to become re-elected. Change to a performance based and transparent system

I find it ludicrous that an incumbent elected official, specifically the President, spends so much of the time that should be dedicated to solving our country's problems, in media, at rallies, and in general... campaigning and fundraising. I feel that the GAO should be responsible for developing a standardized set of metrics for analyzing the performance of a president, and general elected officials, that can be publicized for very little come election time. If the performance and pending initiatives being worked by the incumbent warrant re-election, then this information should be enough to garner the popular vote. An incumbent official should be required to be working like the rest of us, not jet setting and making public appearances. Let's focus on issues in stead of politics.