No, the country can't afford to have a Democrat selecting the next 5 Supreme Court Justices (who will be retiring in the next 5 years).
And for distinctions: Bush has banned Partial Birth Abortion, something that no Democrat President has ever tried to do, much less actually do.
Bush is building our national missile defenses, something that Al Gore was against, as if defending the U.S. from rogue nuclear missile attacks was somehow a *bad* idea.
I didn't see Clinton or Gore cutting income taxes, but Bush cut federal income taxes so much that a family of four earning $40,000 per year now pays slightly less than $4 (yes, four) Dollars per month in federal income taxes (for a Tax Independence Day of January 1).
Democrats weren't exactly lining up to follow U.S. law (i.e. the 1998 Iraq Liberation Act) to effect regime change in the Middle East, either, but Bush did.
So it's rather dishonest, intellectually, to try to claim that there is no difference between Republicans and Democrats. The above issues alone highlight polar opposite positions on the political color spectrum.
Moreover, the whole "libertarian" viewpoint is impractical. Libertarians don't have the money or the popular support to be anything other than a useful tool for Democrats to use to siphon gullible votes away from Republicans, which is precisely why the largest donors to the Libertarian Party here in Alabama are Democratic Party Trial Lawyers. Voters break 5 to 3 Repub to Dem for going Libertarian, thus it is an easy way for the Dems here in Alabama to shift more than a full percent of the Republican vote edge by simply giving a few measly thousands to the Libertarian Party here.
But on top of being tools for the Democratic Party, Libertarians have nonsensical beliefs such as fully Open Borders to immigration and a ban on using our military first, not to forget that Libertarians don't even want a standing Army, Navy, Air Force, National Missile Defense, or Marines, only a volunteer civilian militia...hardly the stuff required for pre-emptively smashing rogue regimes like North Korea or Iran, should they get sufficiently out of line.
Worse, you libertarians like to argue too much. Good Lord you can talk until you are all out of breath (which is to say, for far too long).
And then there is the ingrained Libertarian opposition to taking political baby steps (the stuff of real change). You all want your Revolution "now," and anything less is unConstitutional and unsatisfactory. Forget privatizing Social Security, you all scream, you want to disband it immediately (a political non-starter). Ditto for privatizing Medicare.
And you want your Instant Revolution because none of you have had enough actual elected political experience to yet learn firsthand that such instant gratification is intellectual cannon fodder rather than the sort of thing that actually gets debated and enacted.
Thus, there are hardly any worse enemies to Conservatism and to our great free republic than you misguided, inexperienced Libertarians, for you attempt to trick us with your grand ideas and psuedo-conservative rhetoric at times, yet your every action saps our strength and reduces our ability to enact the real changes required to take back this great nation from the hard core Leftists of academia, the news media, and various entrenched political forces.