The major problem in lacking any fundamental principles other than seeking to become president is that eventually the desire to please those on the right side of the Republican party can backfire. Mitt Romney has been catering to conservatives because they actively supported the invasion of Afghanistan. Mitt insists the US should remain fighting the Taliban as long as it requires to gain a victory, or whatever one wants to term remaining in Afghanistan.
Alas, poor Mitt, you did not realize that conservatives–like most Americans–want our troops out of the country. Latest Pew polls reveal that 59% agree with President Obama who stated a time table while Mitt is against one. Mitt, a majority of REPUBLICANS now want out of Afghanistan.
Of course, this is no problem for Mitt. He will change his mind, adopt the Obama plan and then attack Obama for supporting the ideas that Mitt just abandoned.