President Donald Trump put Russian President Vladimir Putin on notice, and issued some harsh words to China and their ongoing trade negotiations during his 19th week in office."What Vladimir Putin doesnt realize is that if it werent for me, lots of really bad things would have already happened to Russia, and I mean REALLY BAD. Hes playing with fire!" Trump wrote in a Truth Social post Tuesday morning.Dmitry Medvedev, the deputy chairman of the Security Council of Russia and former Russian president, responded in kind and issued his own words of caution to the U.S."Regarding Trump's words about Putin playing with fire and really bad things happening to Russia. I only know of one REALLY BAD thing WWIII. I hope Trump understands this!" Medvedev wrote.WHITE HOUSE REVEALS POSSIBLE PENALTIES ON PUTIN AMID PEACE PUSH: WHATEVER IT TAKESTrumps remarks come as Russia has ramped up its attacks against Ukraine in recent weeks, and as the U.S. has sought to distance itself from the conflict between the two countries. Meanwhile, Trump said on Wednesday that time is limited for Putin to get serious about coming to the negotiating table and engage in peace talks. Otherwise, the U.S. might adopt a different approach, he said."Were going to find out whether or not hes tapping us along or not, and if he is, well respond a little bit differently, but it will take about a week and a half to two weeks," Trump told reporters in the Oval Office on Wednesday.Heres what also happened this week:Trump accused China of violating an initial trade agreement that Washington and Beijing were hashing out in May. Following those negotiations, both countries agreed that the U.S. would cut down its tariffs against Chinese imports from 145% to 30%, and China would reduce its tariffs against U.S. imports from 125% to 10%.But Trump said that China hasnt followed the terms of the agreement, without disclosing specifics."The bad news is that China, perhaps not surprisingly to some, HAS TOTALLY VIOLATED ITS AGREEMENT WITH US," Trump said in a social media post Friday. "So much for being Mr. NICE GUY!"'NO REASON' FOR NEW NUKES: TRUMP FLOATS DISARMAMENT TALKS WITH CHINA, RUSSIAU.S. Trade Representative Jamieson Greer said after Trumps post in an interview with CNBC that China had failed to remove its non-tariff barriers, as outlined in the deal."The United States did exactly what it was supposed to do, and the Chinese are slow-rolling their compliance which is completely unacceptable and has to be addressed," Greer said on Friday.Meanwhile, China pressed the U.S. to reverse course and urged the U.S. to address its own mistakes."China once again urges the US to immediately correct its erroneous actions, cease discriminatory restrictions against China and jointly uphold the consensus reached at the high-level talks in Geneva," Chinese embassy spokesperson Liu Pengyu said in a Friday statement.Canada also could receive protection from Trumps so-called Golden Dome if it becomes part of the U.S. Trump has long pushed for Canada to become the 51st state, along with expressing interest in acquiring Greenland and the Panama Canal.TRUMP CLAIMS CANADA CONSIDERING OFFER OF FREE GOLDEN DOME IN EXCHANGE TO BECOME 51ST STATE"I told Canada, which very much wants to be part of our fabulous Golden Dome System, that it will cost $61 Billion Dollars if they remain a separate, but unequal, Nation, but will cost ZERO DOLLARS if they become our cherished 51st State," Trump said in a Tuesday social media post.Trump has long touted setting up a Golden Dome, a defense shield initiative for the U.S. akin to the one Israel has protecting itself.