Former Trump senior advisor Kellyanne Conway weighs in after Republicans called for key Biden aides to testify on the concealment of the former president's decline. #FoxNews #Biden #Coverup #Politics Subscribe to Fox News! https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/ FOX News Channel (FNC) is a 24-hour all-encompassing news service delivering breaking news as well as political and business news. The number one