Student debt has reportedly reached a breaking point for President Trump, and it's mostly thanks to Sen. Elizabeth Warren (D-Mass.).

Since the summer, Trump has grown increasingly worried about a challenge from the progressive 2020 presidential contender, and especially her proposal to forgive all student loan debt, aides tell The Washington Post. So in August, he reportedly ordered his administration to draw up its own "blueprint" for tackling student loan debt — and hasn't gotten a solid answer yet.

Warren has proposed forgiving student debt held by households making under $100,000 a year, while Sen. Bernie Sanders (I-Vt.) has suggested erasing it altogether. Warren also plans to make two- and four-year public college free, leaving Trump complaining to aides that "we don't have a plan," administration officials tell the Post.

Yet since Trump tasked Education Secretary Betsy DeVos with addressing the debt crisis, "months have passed after several contentious meetings with no consensus internally about how to attack the problem," the Post writes. It's hard to "rival expansive and expensive plans without proposing massive spending," the Post continues, and DeVos has continually pushed to shrink her department's spending and oversight.

A White House spokesperson said said the Trump "recognizes the serious situation many Americans find themselves in with rising student loan debt and has already taken significant administrative and regulatory action." Read more at the The Washington Post. Kathryn Krawczyk