I'm curious what you mean by that, because I've never heard anyone seriously argue against that assertion. Our top marginal corporate tax rate is one of the highest, according to Wikipedia [1], though companies are generally pretty good at not being too profitable and therefore not paying a very high tax rate, if that's what you mean.

[1] https://en.wikipedia.org/wiki/Corporate_tax_in_the_United_St...

Excerpt: In 2014 the United States had the third highest general top marginal corporate income tax rate in the world at 39.1 percent (consisting of the 35% federal rate plus a combined state rate), exceeded only by Chad and the United Arab Emirates However, the average corporate tax rate in 2011 dipped to 12.1%, its lowest level since before World War I, largely due to the great recession and a bonus depreciation tax break.