Because of 'hope'. America took them at their word. But so far, the Republicans have been nothing but duplicitous liars. They have no intention of doing anything.
All the Republicans are interested in is drawing a salary, keep getting their kickbacks, and getting reelected. America and the American people, mean nothing to them. They only want to get whatever they can get for themselves for as long as they can make it last. Then they and their family will retire as multimillionaires, and screw everybody else.
You know, it actually hurts me to say this. As demented, perverted, and misguided as the Democrats are, at least they have a mission. Democrats have hardcore goals that they will do anything to achieve. "By any means necessary" is their cult chant. That is spirit. That is passion.
Republicans on the other hand do not seem to have any 'passion' about anything. They are not driven by any mission. They seem to sort of amble along maintaining the status-quo at any cost. Republicans don't want to do anything about anything. Stall, delay, kabuki theater, more stalling, then vacation, speeches, committees, then more debate, more stalling, more debate, more committees, more speeches, vacation again, ... and on and on and on. And nothing ever gets done.
I have no love or respect for Democrats, but you have to give the Devil his due. They run circles around Republicans with their fire, their passion, and their motivation. It is shame. But it is true.