"Imagine a world where Scalia’s seat — and two others — remain vacant for five years because a Republican Senate refuses to confirm anyone named by the president,” a legal writer wrote.
A spokesman for the attorney general's office said that the Trump Foundation had assured them that it was complying with the order to stop raising money.
The 29 signers said they 'do not trust' Trump on judicial nominations or constitutional limits.
With Trump faltering, the Democrats are making a foray into a traditionally Republican state.
In 1993, Martha Sherrill, then a Style reporter at The Washington Post, interviewed then-First Lady Hillary Rodham Clinton.
The idea that Democrats and their allies are rigging elections is a mainstay of conservative politics.
The spot is the latest by the Democrat seeking to focus on the Republican's character.
At an appearance with vice-presidential candidate Mike Pence, future contender Sen. Tom Cotton (R-Ark.) introduced himself to Iowans and discussed the election — but didn't mention Trump.
“We will absolutely accept the result of the election,” Pence said.
The senator from Vermont says he will use the event to remind voters of what's good about the Democratic platform.