liz mayer tweeted -- it was make america awesome's ad, not ted cruz suggesting she not hold ted cruzesponsible. >> wives and children ought to be off-limits. >> you would think. >> that enhances trump supporters who are angry what's going on in establishment. and you run something like this. lou: why are we seeing so much ignorance out of establishment, out of mitt romney, who was mr. clean, until this year? >> hard until you have the bit in your mouth and you don't win to think you can't step up to the stable and start where you left off. mitt is a forgotten figure at this point. lou: those two people on that ticket, mitt romney and paul ryan, they're desperately searching for something. ed, good to have you with us. >> thank you. lou: breaking news, as the manhunt is continuing for the prime suspect in the belgium terrorist attacks, the islamic state has trained and sent at least 400 terrorists to carry out new attacks in europe. the network of semi autonomous terrorist cells shows the islamic state is extending reach into europe further as it loses some ground in syria and iraq. o

the cruz pac, super pac, i shouldn't say that, they are actually just anti-trump, they say, led by liz mayer, former deputy campaign director for mitt romney, sending a vicious, to me, a vicious attack on you, and reaching to your wife, then the exchange with you and senator cruz, an exchange of threats, if you will, an extraordinary display. are you going to continue -- and i've heard you answer this 100 times with probably a hundred different people. seems to me, this is one which when wives are brought into this, it requires a different approach altogether. i want your thoughts in how you're going to proceed and what you think the standard should be? >> i'm glad you asked me the question, i thought it was terrible. first of all it's "gq" magazine, a nice mainstream magazine, a good magazine, they had my wife on the cover. my wife was a very, very successful model, really successful. beautiful woman and all, and she did a shoot for gq, i think it was a cover shoot or a cover picture, but it was a good issue, very successful issue, and it was a shoot for "gq" magazine. so ted cruz knowingly

. >> liz mayer, the republican strategist in charge of the 123457b9 trump super pack make america awesome has claimed full responsibility for the ad that included a photograph of melania trump. the ad that started this latest feud between donald trump and ted cruz. liz mayer feeted, "hi, donald, i know you're really upset about that ad but it was make america awesome's, not ted cruz's. the photographer who owns the rights to the "gq" photograph says that no one purchased the rights to that photograph. so he got -- he's the one that started it. and somebody bought the rights. let's see. donald trump says that he was the one. or his campaign bought the rights. and gave it to the super pac. none of that. none of what donald trump has said about this has been proven true. up next, donald trump won the louisiana primary but is losing the delegate count there. ♪ [engine revs] ♪ ♪ [engine revving] the all-new audi a4 is here. can't afford to let heartburn get in the way? try nexium 24hr, the #1 selling brand for frequent heartburn. get complete protection with the leader in frequent heartburn. t

. >> reporter: liz mayer created the digital ad featuring the former model in "british gq." >> i think donald trump has obliterated all conceivable lines in the course of this campaign, and i'm perfectly comfortable with what we've done. >> for cruz there's some lines you shouldn't cross. >> we shouldn't attack each other's spouses and children and that's gutter politics. >> reporter: hoping to set the rules in a race that doesn't seem to have any. hallie jackson, nbc news, new york. >>> still ahead tonight, birth control battle. a potential landmark case now before the supreme court, but how will the vacancy on the bench impact the decision? needles of diabetic nerve pain, these feet played shortstop in high school, learned the horn from my dad and played gigs from new york to miami. but i couldn't bear my diabetic nerve pain any longer. so i talked to my doctor and he prescribed lyrica. nerve damage from diabetes causes diabetic nerve pain. lyrica is fda approved from moderate to even severe diabetic nerve pain. lyrica may cause serious al