It is doubtful whether Donald Trump knows Lidl, and it is unlikely that Melania or Ivanka will ever go shopping in one of its no-frills stores. But, if the US president-in-tweet really means what he says about American jobs and putting more spending money in the pocket of the Average Joe, then he should be one of the very first to welcome the German discounter.We now know that Lidl will enter the US this summer, at least six months ahead of schedule. Twenty stores are planned for Virginia, North Carolina and South Carolina in a first wave and up to 100 outlets across the East Coast by mid-2018. This will create around 4,000 new jobs over the same period.That's quite a bold start, but it took arch-rival Aldi 40 years to become even America's 20th-largest retailer. So, if Lidl doesn't want to wait most of this century before it joins the US big league, could the company go an a buying spree?