Trump and Obama are the most popular figures in their parties, and their appearances on the campaign trail are created to stoke enthusiasm among core supporters in the late stages of a midterm congressional election widely seen as a referendum on Trump's first two years in the White House.
At a campaign event in Georgia on Saturday for Georgia Governor Stacy Abrams, supporters yelled at the former president that they could not hear him.
Later, he also accused his Republican successor of "constant fear mongering" and for having a disdain for the truth that was detrimental to American democracy.
"This Tuesday I need the people of IN to send a message to Chuck Schumer, Nancy Pelosi, Maxine Waters and the radical Democrats by voting for Mike Braun", Trump said as the crowd erupted IN boos. "And [voters are] going to say Republicans have offered a record of results and Democrats are offering resistance and going back".
Democrats meantime insist that only they will protect the healthcare gains made under President Barack Obama, that Trump has employed inhumane measures to keep migrants out, and that the divisiveness he has fostered must end.
Obama has taken on a more public role this fall after refraining from offering a full-blown counterpoint to Trump's policies, which have sought to dismantle Obama's legacy. Later in the day, the former president was campaigning in his hometown of Chicago for businessman J.B. Pritzker, Democrats' nominee for IL governor.
Bloomberg, the billionaire independent who is considering a 2020 presidential campaign as a Democrat, appears in the 2-minute ad airing Sunday during CBS's "60 Minutes".
While Democrats are defending more incumbent seats than Republicans in the Senate, polling has consistently shown the party has a solid chance of retaking control of the House of Representatives.
Former President Barack Obama has praised Democratic Sen.More news: Affordable Care Act Marketplace open enrollment begins
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The then 47-year-old Democrat, who became the 44th US president, garnered 365 electoral votes and almost 53 per cent of the popular vote, while his 72-year-old Republican challenger captured 173 electoral votes, more than 45 per cent of the popular vote.
"I've been involved in scores of conversations about stopping illegal immigration from Mexico and never once has there been a discussion of the political impact in USA domestic politics", Pompeo said.
Democrats are being powered by African-Americans - 84 to 8 percent - Latinos - 57 to 29 percent - by voters between the ages of 18 and 34 - 57 to 34 percent - and women - 55 to 37 percent.
Speaking at a rally in Macon, Georgia, the president ramped up his hard-line rhetoric on immigration as he issued warnings about the caravan of migrants heading to the United States border with Mexico.
Republicans are expected to keep their slight majority in the U.S. Senate. Republican National Committee Chairwoman Ronna McDaniel pointed to the recent October jobs report as evidence Republicans are delivering. "That's a great closing argument".
"But you better get out and vote", he said.
"The fact we still have a narrow path to a majority is a sea change from where we were two years ago", he said on ABC.
Democrats increasingly confident of a House takeover acknowledged their long odds in the Senate, yet refused to wave the white flag. Thom Tillis, North Carolina Republican, told "Fox News Sunday". USA intelligence agencies jointly asserted last month that Russia, China, Iran and other countries are engaged in continuous efforts to influence American policy and voters in the upcoming elections and beyond.