(Reuters) - Highlights for U.S. President Donald Trump’s administration on Friday: Trump promises a big announcement about tax reform next week and orders an administration review of Obama-era tax rules written to discourage U.S. companies from relocating overseas to cut their tax bills. Trump tells the Treasury Department to examine two powers given to regulators to police large financial companies following the 2008 financial crisis. South Korea says it is on heightened alert ahead of another important anniversary in North Korea, with a large concentration of military hardware amassed on both sides of the border amid concerns about a new nuclear test by Pyongyang. Trump, striving to make good on a top campaign promise, is pushing fellow Republicans who control Congress to pass revamped healthcare legislation but the same intraparty squabbling that torpedoed it last month could do it again. Defense Secretary Jim Mattis says Syria has dispersed its warplanes in recent days and that it retains chemical weapons, an issue he says will have to be taken up diplomatically. The Department of Justice threatens to cut off funding to California as well as eight cities and counties across the United States, escalating a Trump administration crackdown on so-called “sanctuary cities” that do not cooperate with federal immigration authorities. The United States will not make an exception for American companies, including oil major Exxon Mobil Corp, seeking to drill in areas prohibited by U.S. sanctions on Russia, Treasury Secretary Steven Mnuchin says.  Trump and his fellow Republicans who control Congress face their first major budget test next week, with the threat of a government shutdown potentially hinging on his proposed Mexican border wall as well as Obamacare funding. The House of Representatives Intelligence Committee says it has invited FBI, National Security Agency and Obama administration officials to testify as it restarts its investigation into alleged Russian meddling in the 2016 U.S. election. U.N. Secretary-General Antonio Guterres meets with Trump at the White House for the first time since both took office earlier this year and amid a U.S. push to cut funding to the world body and its agencies. The United States has offered to help fund Mexico’s efforts to eradicate opium poppies, a U.S. official says, as Mexican heroin output increased again last year. 
Highlights: The Trump presidency on April 21 at 6:12 p.m. EDT/2212 GMT