Companies invest in R&D with the expectation of higher returns. But R&D spending is risky. Higher risk requires higher returns. That is a fundamental law of economics. Increasing the cost of R&D spending is counterproductive. Higher costs result in less spending and in lower long-run productivity. A tax change that was part of the Republican Tax Cuts and Jobs Act of 2017 will discourage investment in R&D in the future.
Amortizing R&D spending is terrible policy. It will lead to a poorer America. Republicans are pushing to repeal that part of the 2017 Tax Cuts and Jobs Act that requires amortizing R&D expenses. Republicans want immediate expensing, deducting, of R&D expenditures. This would be good policy in support of future innovation.