Construction of the wall could begin in months, but planning for the massive project is "starting immediately," Trump said Wednesday in an interview with ABC News.Will the wall be ... moreConstruction of the wall could begin in months, but planning for the massive project is "starting immediately," Trump said Wednesday in an interview with ABC News.Will the wall be so high you can't get over it, so long you can't get around it, and so low you can't get under it?