A quick tip that you may not already know is that you can switch the View of the map to be "State Wealth". The default is "Awareness". You'll see it up at the top, near the turn counter in the upper right corner. Click the down arrow of the combo box to switch to different views. In State Wealth View, the darker yellow, the better. Fund raise in those states to really bring home the cash.
Another tip for earning money is to build "Campaign HQs". You can only build one type of HQ per state, and you have three types to choose from (Campaign, Consulting Office, and Outreach Center). Once you've built an HQ, you can then upgrade it to get further benefit from it. So in the case of a Campaign HQ, a level 1 nets you 10k a turn per HQ, but if you level it up to level two you'd get 30k per week, and a level 3 gives 90k per week!
You can check out more detailed info by accessing the "Rasing Funds" section of the Tutorial screen. You can get there from the Main Menu.
I hope that's helpful info.
