Because his support amongst real conservatives - not the frauds that cheerlead for him - will completely dry up.
If Trump files his lawsuit - a big “if” considering he’s all bark - he will never win the presidency. Thus, his campaign is over the instant he does it.
Now that is a reach! As far as the “frauds that cheerlead for him”, the results of yesterday's survey here on the Free Republic show that there are over twice as many people who support Trump here than “real conservatives” such as yourself.
Some of us find it offensive when self appointed holier than thou experts judge us to be not as pure as themselves and call us “frauds” and worse. Many of us have been life long conservatives and reached our decision as to which candidate to support through long deliberation and careful consideration. It is the height of hypocrisy and conceit.
If Cruz is still a factor after Super Tuesday I have little doubt that a lawsuit will be filed. I am sure that Trump's team of lawyers is very carefully considering the location to make sure that they will have the highest probability of being assigned a judge that will hear the case and that the appeal will be heard by in a Federal District where they will receive a panel of judges who will be the least sympathetic to Cruz.
You can thank the Senate for approving over 300 Federal judges hand picked by the Obama administration for increasing the probability that two of the three judges on the panel will give Ted the Thumbs down if Trump's lawyers give them anything that sounds reasonable to work with in the initial trial. From there it will be appealed to the Supreme Court which will either refuse to hear the case or be deadlocked now with four conservatives vs. four liberal justices after Justice Scalia’s untimely departure. Either way Cruz's fate will be in the hands of two liberal judges from wherever the Trump team decides to file... most likely somewhere in the 9th Circuit.
Even if the process takes a while, the doubt created in voter's minds by a real eligibility lawsuit being heard by a real judge will torpedo the Cruz campaign and Trump will keep barreling along like a run away freight train. Is this fair? No. Is this the way it will be done? Yes. Will the media try to come to Cruz's defense like they did with Obama? Don't make me laugh. Would it have been attempted before the death of Scalia? No.
Will the arguments made here about the finer points of constitutional law concerning Natural Born Citizenship make any difference to the two liberal Federal Judges assigned to be the executioners of Ted's campaign? Again get serious. Will the “true conservatives” sit another election out after their boy goes down in a predictable ball of fire? You tell me! Next time maybe the "true conservatives" will decide to support someone not born outside the country, whose father didn't fight alongside Castro during the revolution and maybe then your hopes might not be dashed. Until then stop acting like spoiled babies who couldn't give a damn about the fate of future generations.