A GOP congressman admitted that he and other lawmakers probing President Joe Biden and his son’s actions to build up an impeachment inquiry were aware the key witness testimony in the case was shaky. With the star witness in the impeachment inquiry against President Joe Biden facing felonies for cooking up a bogus story shaped by high-level Russian intelligence contacts pinning the president and his son Hunter for taking $5 million apiece in bribes — Rep. Ken Buck (R-CO) came forward to acknowledge that they knew it wasn’t solid well in advance. With Alexander Smirnov being accused of telling …