Some influential conservative thinkers have concluded that Mitt Romney’s struggle to ignite voter enthusiasm reflects a more serious problem for Republicans in setting unrealistic expectations for their presidential nominee. Calling their alliance Project Liberty, the newly formed group says the former Massachusetts governor cannot beat President Obama unless tea party members and the GOP’s activists — including conservatives on the Republican National Committee — adjust their mindset about insisting on a fully formed, ideologically reliable candidate as their standard-bearer.... Project Liberty backers have concluded that Mr. Romney will not win the White House on the basis of something he is...