The GOP nominee has gone from obscuring how little he pays in tax to arguing that it qualifies him to fix the system.

= The GOP nominee has gone from obscuring how little he pays in tax to arguing that it qualifies him to fix the system.

大意：这位共和党的提名人已经是不仅对自己纳税多么少含糊其辞而且还争辩说这使他有资格修正这个制度了。

### from ... to 从...到， 处理为“不仅...而且”