Trump tweets because by doing so he can bypass the media and get his word DIRECTLY to his followers on social media who number in the area of 100 MILLION.
Without the Social Media all anyone would hear or read is what the biased media want us to hear or read.
I love his tweets. I am just pointing out these early wins will put the Left on alert and motivate them to figure out more corrupt ways to tweak election in their favor. (Ballot harvesting and things like that.)