Can Malaysia's unlikely political double act score election triumph?

Can Mahathir and Anwar Ibrahim, right,successfully join forces to topple Najib Razak, center?

(CNN)Two former foes are joining forces to oust Malaysia's sitting prime minister, although whether their unlikely alliance can topple the incumbent in next week's general election remains to be seen.

The political odd couple, former prime minister Mahathir bin Mohamad, 92, and his one time deputy Anwar Ibrahim, have both engineered, and endured, decades of political machinations and backstabbing -- mostly targeting each following Anwar's dismissal from Mahathir's cabinet in 1998.
But despite years of rivalry the two long-time operatives are coming together again in an attempt to wrest control from Prime Minister Najib Razak.
Should he win, the elder statesman has pledged that he will step aside for Anwar, whom he once jailed on sodomy and corruption charges that critics said were politically motivated.
"Mahathir has a short time horizon, he's saying that he'll only be Prime Minister for two years," says Meredith Weiss, professor of Political Science at the University at Albany. But despite this, "(he's) definitely sincere in wanting to oust Najib by any means possible."
With less than one week to go to the election, the opposition party led by Mahathir remains the underdog, analysts say, despite momentum moving toward the newly formed alliance.
Local media reports that polls indicate Mahathir and Anwar's Pakatan Harapan coalition has steadily gained support, at the expense of Najib's ruling Barisan Nasional coalition.
However, in a fresh twist, the veteran politician is being investigated under a controversial anti-fake news law over a claim his plane was sabotaged, police said Wednesday.
A supporter wears a badge with photographs of former Malaysian prime minister and opposition party Pakatan Harapan's prime ministerial candidate Mahathir Mohamad and jailed former opposition leader Anwar Ibrahim.