Republicans are increasingly vulnerable to losing control of both chambers of the U.S. Congress as President Donald Trump's unpopularity threatens their narrow majorities ahead of November's midterm elections. As Democrats target gains in the House of Representatives and an expanding Senate battleground, Trump has promised every adult American citizen five thousand dollars if Republicans retained control—a conditional cash pledge highlighting the mounting pressure to reverse his party's fortunes. And as Sherwin Bryce-Pease reports, any such future cash payment would be contingent on Congressional approval ....