That's not terribly informative. Do you oppose them both because they are disgusting and sleazy in their personal lives? Or is it because both are moderate to liberal in their politics? Or is it one of their many other shared traits?
1. Both Clinton AND Romney passed "assault weapons" bans while in office. Clinton could only get a 10 year ban through, while Romney signed a "Permanent Assault Weapons Ban" while governor in 2004. Clinton and Romney both claim they "hunt" and support the second amendment.
2. "Gay" issues. Both Clinton and Romney supported gay marriage. Clinton was able to get "don't ask don't tell" initiated, but that is all. Massachusetts became the first state in the union to allow gay marriage, under Romney's slimy flip flopping leadership. He somewhat allowed, somewhat helped this to come to pass, so he could appear to have stayed on the fence, how Romneyesque.
3. Clinton assigned his wife to lead a national healthcare roundtable and task force in a failed attempt to create nationalized health care. Clinton Failed. Romney on the other hand succeeded in creating the first fully marxist health care system in the US.
4. Clinton and Romney both dodged the draft during Vietnam. Clinton for "School" and Romney to recruit for his cult. I could go on and on, but the pattern that emerges, is that Romney claims to be a conservative, but in reality is better at passing liberal hallmarks than Clinton.