The argument to congressmen should be succinct.
1) Nothing bad will happen if this TPP fails.
2) Many exceedingly bad things are thought to take place if Obama is given this power and he decrees the TPP without the vote of the senate.
3) If these exceedingly bad things do come about because of your vote, you will not only be stripped of office, but you and your entire family will lose their citizenship, be deported and denied reentry to the United States ever again, your names will be stricken from the rolls, everything you ever earned will be forfeit, and your name will be a curse on the lips of Americans for a generation.
The senate will get a vote after the TPP has been made public for at least 60 days.
The vote will be only on the TPA, not the TPP.