In multiple tweets, Trump tore into Nancy Pelosi after Democrats rejected his proposed government shutdown solution

President Donald Trump also said Sunday he was "still thinking" about House Speaker Nancy Pelosi's request to either postpone the State of the Union speech or submit it in writing.

Pelosi cited security concerns and asked Trump to prioritize opening the government before he delivers the speech.

The State of the Union is currently scheduled for January 29 and would mark the first such speech given during a shutdown.

President Donald Trump went on a Twitter tear against Nancy Pelosi Sunday morning, which ended with him saying he was "still thinking" about House Speaker Nancy Pelosi's request to postpone his State of the Union speech or submit it in writing.

"Nancy, I am still thinking about the State of the Union speech, there are so many options - including doing it as per your written offer (made during the Shutdown, security is no problem), and my written acceptance," Trump wrote in a tweet. "While a contract is a contract, I’ll get back to you soon!"

Pelosi requested last week that Trump postpone delivering the State of the Union, which is slated for a January 29 joint session of Congress, citing security concerns during the record-breaking, ongoing government shutdown.

"Sadly, given the security concerns and unless government re-opens this week, I suggest that we work together to determine another suitable date after government has re-opened for this address or for you to consider delivering your State of the Union address in writing to the Congress on January 29th," Pelosi wrote in a letter to Trump last week.

Security concerns cited by Pelosi in her request point to the complications facing White House and administration staff, including Secret Service agents who were working without pay.

After the request, Trump seemingly retaliated by canceling Pelosi's military flight Belgium and Afghanistan.

The State Of The Union address would give Trump another chance for a public appeal on behalf of constructing his long-touted border wall, over which congressional lawmakers fell into gridlock and triggered a shutdown on December 22.

Read more: Trump's State of the Union — whenever it is — won't bail him out of the government-shutdown mess

Since the shutdown began, Trump has clashed with Pelosi several times, claiming without evidence she is controlled by "the radical left" and storming out of a meeting with her and Senate Minority Leader Chuck Schumer after they said they would not consider a deal that included funding for the wall.

Less than an hour before he tweeted he was still considering Pelosi's request, Trump tweeted to claim that Pelosi had become a "Radical Democrat," and is petrified of "lefties" within the party.

Trump also took aim at Democrats' rejection of a "compromise" he announced Saturday in a much-teased announcement where he offered Democrats a deal combining temporary protection for so-called "Dreamers" and other immigration proposals in exchange for funding for his border wall.

The proposal immediately prompted sharp backlash from Democratic lawmakers, who rejected the offer before Trump even announced it.

Pelosi rejected the plan Saturday, saying: "Unfortunately, initial reports make clear that his proposal is a compilation of several previously rejected initiatives, each of which is unacceptable and in total, do not represent a good faith effort to restore certainty to people's lives."

As the shutdown reaches its 30th day, lawmakers and the Trump administration remain in a tense standoff as Trump continues his demands for a $5.7 billion border wall and his public hits at Pelosi.