Key to Temer's survival is whether the PSDB, Brazil's third largest political party, will stick with his coalition or bolt. The party is deeply divided, with many members wanting to distance themselves from Temer to improve their re-election chances.
Under Brazilian law, the lower house of Congress must now vote on whether to allow the tribunal to try the conservative leader, who had replaced impeached leftist President Dilma Rousseff just last year and is now charged with accepting bribes.