If any Member of either House shall his seat in such House shall thereupon become vacant.(a) for one entire session thereof, fail to give his attendance therein without the permission of such House;(b) take any oath or make any declaration or act of acknowledgment of allegiance or adherence to any foreign prince or power;(c) do, or concur in, or adopt, any act whereby he may become a subject or citizen of any foreign state or power;(d) become bankrupt, or take the benefit of any law relating to bankruptcy;(e) be attainted of treason or be convicted of any crime and is sentenced or subject to be sentenced to imprisonment for any term exceeding one year unless he has received a free pardon in respect thereof; or(f) become of unsound mind