Cigarettes, and other tobacco prodcuts, will be given the same treatment under the law as marijuana by 2020.
And for other joy in the future:
Alcohol will start to be more severely restricted by 2020 as well, possibly banned (again) by 2060.
Handguns will effectively be unavailable by 2030, hunting rifles and shotguns severaly restricted (a la Japan) by 2050, and probably a complete ban on all firearms with house-to-house sweeps by 2070.
Fireworks for use by private individuals will be banned by 2020.
Powerful sports cars (soon to be termed “assault cars”) will be so severely restricted by 2050 that only museums or special collectors will have them.
Certain high-fat, unhealthy foods (soon to be termed “assault foods”) will fall under Government restrictions by 2030.
I think these events will come regardless of what party is in control. however, these events may all come sooner if Democrats win and maintain control of Congress. (and no, I will not debate this now. Take this as a WAG at face value).
If Republicans keep winning and maintain control of Congress, we might see some additional bans of a different sort:
Pornography in magazine or net form may be outlawed by 2030.
Extensive internet filters will be put into place to screen for objectionable content (porn, radical thoughts, etc) by 2015.
Abortion will be very restricted by 2020, and possibly have a Constitutional Amendment against it by 2025.
And so forth. Fun, fun, silly-willy!