While the former congressman from Battle Creek isn't officially a candidate, he is expected to seek the Democratic nomination for next year's race.
"We support you and strongly encourage your candidacy for governor of our state, and we write to let you know we will be proud to support you," the congressional Democrats said in a letter dated Thursday and released to reporters on Friday.
The letter was signed by Sens. Carl Levin and Debbie Stabenow and Reps. John Dingell, John Conyers, Sander Levin, Gary Peters and Dan Kildee.
In an interview with The Associated Press earlier this month, Schauer, 51, said his frustration with Republican Gov. Rick Snyder's decisions — including to cut taxes for businesses and raise them for individuals — combined with recent support from fellow Democrats, have him taking a hard look at running in 2014.
A memorandum prepared for the Democratic Governors Association cited Schauer as a strong candidate to take on Snyder. And other potential Democratic candidates, including former U.S. Rep. Bart Stupak and state Board of Education President John Austin also have endorsed Schauer, making his gubernatorial bid likely in the near future.
Snyder has not launched a re-election campaign, but is expected to do so later. Spokeswoman Sara Wurfel has said the governor is focusing his attention on "getting things done and bringing our state back."
Meanwhile, the congressional Democrats told Schauer they "stand ready to fight alongside" him "to move Michigan forward."
"We need a new direction in Lansing, and we know from your long record of public service that you will lead Michigan in a better direction," the congressional Democrats wrote in their letter.