What will Donald Trump build in our devices?
A firewall.
Listen up, buttercup. This joke is banking on the fact that Donald Trump, that dude with the funny hair, is known for wanting to build a wall, right? Well, a "firewall" is like a digital wall for your computer. It keeps the bad stuff out. So, the joke is playing on words, get it? Wall... firewall? I bet you still use Internet Explorer.