Obamacare was passed before any of those four candidates ran for office. Oh, and you ignore the SLEW of candidates preferred by the party who have lost the past two cycles, and you also ignore the times the party abandoned or undercut candidates not of their choosing. For example, they backed sore-loser Murkowski as a third partier rather than backing the conservative winner of the primary.
I also wouldn’t call a Delaware Senate race or a race against Majority leader Reid easy wins. The other two definitely should have been.
All so called moderate GOP congress critters voted against Obamacare. That is enough for me. My main point is I prefer “politically savvy” candidates who can win. It does not matter who supported them, the Tea Party or GOPe or Koch Brothers. On extremely critical issues such as wealth re-distribution and socialized healthcare, I prefer republicans of all stripes over any current democrats.