The election analysis provided by the Charles Schwab Corporation does not constitute and should not be interpreted as an endorsement of any candidate or political party.

Donald Trump has pulled off an astonishing upset to win the White House, securing at least 288 electoral votes as of 3:30 a.m. EST to defeat Hillary Clinton.

With Republicans retaining their majorities in the House of Representatives and the Senate, the party will have the ability to control the agenda in Washington.

The narrow margin in the Senate will afford Democrats the opportunity to use every Senate rule available to them to block or slow Republican initiatives in that chamber, but Republicans will have the advantage in trying to push through their priorities, potentially including tax cuts and changes to trade policy, health care and immigration.

Futures markets reacted strongly overnight to Trump’s surprise win. Market volatility is likely to remain highly elevated amid uncertainty about Trump’s presidency.

Trump significantly outperformed pre-election polls—similar to the Brexit vote in Great Britain last summer. Trump was able to redraw the electoral map, winning Wisconsin, a state that had not voted for a Republican for president since 1984, and he was ahead in Michigan, which had voted for Democrats in the last six presidential elections. He also won the battleground states of Florida, Iowa, North Carolina, Ohio and Pennsylvania.