During gameplay on the campaign map
Hold control and press the M key to set your cash to 5,000,000.
You can also type CtrlR to rally states to the party they naturally tend to support.
After creating a candidate in the game simply text edit the file created with the name of the candidate in the DATA folder of the game directory. This is an easy way to alter starting money, the candidate's qualities, home state or starting political party.
Alternatively, if you want to edit the candidates already created in the game edit the file called CoreCandidates.CANDIDATE in the DATA folder.