I picked the game up yesterday and it's a lot of fun, but after a couple campaigns, I've noticed a couple things that the game is currently lacking and I'd love to see added in. I'm going to try and mod my own game to make these possible, but I'd love to see them in an 'official' version.
In every political campaign, there are outside events that affect the landscape. A few weeks ago there was the terrible shooting in Colorado, in 2008 there were the TARP negotiations in August/September that McCain suspended his campaign for, and there are a lot more under the October Surprise Wikipedia article. There should be random events that happen that make an issue or two more important to voters and swing their opinion for or against the topic. Possible examples being a nuclear reactor meltdown, causing all states with nuclear power stations to care a lot more about the Alternative Energy issue, sea levels rise a drastic amount after an ice shelf collapses into the ocean making all states with coastline care more about the environment, Israel being attacked, starting a war causing the Supporting Israel issue to be more important, etc. There should be some event relating to every issue that causes a large block of voters to care more about the issue and swing their opinion to opposing or favoring the issue.
At the moment, ads can only either be about you or your opponent supporting or opposing an issue. There should be issue ads that raise the importance of an issue without affecting the candidate's opinion of the issue.
There need to be more endorsements. Maybe governor's endorsements for every state, raising your awareness and approval by 1% a week in their state, a former president whose endorsement buffs your credibility, possibly even random endorsements from celebrities that can be positive or negative, certainly though there should be more interest group endorsements and some of those should be neither democrat or republican.
Debates should be implemented.
This one I'm not quite sure about, but it could make things really interesting and add a higher difficulty level for advanced players.
At the moment, the map can get pretty crowded if I send three or four political consultants to one state or have a bunch of political operatives in one state. This makes it kind of annoying when trying to click on your candidate in that state or when you're trying to move that one person to another state. There should be only one statue/bobblehead for operatives in a state that has a little (x4) marker by it if you have four people there, or (x2) for two people, etc. Clicking on that statue would open a menu with the full list of operatives you have in that state and an 'action' button by their name so you can use dropdown menus to "Send (2) (Moneymen) to (California)" If you're about to make a fundraising trip there.