Bernie Sanders met with President Barack Obama at the White House Thursday about the path forward for his campaign after rival Hillary Clinton secured the Democratic Party's presidential nomination this week, dpa reported. Sanders told reporters after the meeting that he will continue to campaign through the primary in the US capital on Tuesday. He stopped short of endorsing Clinton, but said he will meet with her in the coming days and vowed to do everything he can to defeat Republican candidate Donald Trump. "I am going to do everything in my power and I will work as hard as I can to make sure Donald Trump does not become president of the United States," Sanders said outside the White House. Clinton on Tuesday declared herself the party's presumptive nominee after reaching the number of delegates needed at the party convention to be named its standardbearer in November elections. Sanders has hung on through the final contests in the hopes of convincing party officials to instead back his candidacy, despite trailing Clinton in the overall delegate count.