Every single claim of Rep. Bill Johnson is a myth.
1) Cutting the business tax rate to 15% (from rates "up to 40%")
First of all, most all businesses pay nowhere near the official top rate of 35% (not 40, Mr. Bill!  Why lie about something that anyone can look up?).  Much more typical: ATT paid a tax rate of 8.1%; Boeing paid a tax rate of 5.4%. last year.  A few companies (with bad CFOs?) certainly pay 35%.  I have no particular objection to lowering all businesses' tax rates to the same 15 or 20% (with no special deals or loopholes for anybody).  BUT, the cost of those cuts is estimated at $2 trillion in lost revenue.
See http://www.marketwatch.com/story/trumps-15-corporate-tax-rate-could-cost-the-government-2-trillion-2017-04-25 

What's going to make up the income shortfall?  You guessed it, raising either individual tax rates or raising the budget deficit.  There isn't much else.  I wonder which of these Mr. Bill is for??