Mitchell was reacting to unconfirmed reports that Prime Minister Thomas, who is facing his second motion of no confidence within a three month period, is considering several options including proroguing parliament as he seeks to save his embattled National Democratic Congress (NDC) government.
The latest motion against the prime minister has been filed by Karl Hood, a former foreign affairs minister, who resigned from the government earlier this year.
Thomas had survived the first motion filed by Mitchell in May by an 8-5 margin and political observers and commentators say he faces an uphill task in keeping his government together ahead of the July 2013 constitutional deadline for the next general election.