[mrguyorama]

Charitably, the democrats don't care to take any action because there's never been evidence that voter fraud is an actual issue. It happens, in minuscule amounts, in most elections and is statistically meaningless. Most cases of voting fraud in the US are mistakes, because sometimes people don't realize when they've lost the right to vote, or didn't know they were taken off the voter rolls due to inactivity, or being incorrectly listed as dead or similar.

How much are we willing to spend on non-issues?

This is not my opinion however, as I think the US could do with a guaranteed, everyone has it, national ID card. Republicans however definitely don't want that, as it could be evidence that a government can actually do something right, and that's anathema to them, and also because a not-small group of evangelicals think that a government issued ID is a sign of the devil or something.