Joe Biden will be trying to woo undecided voters in his annual State of the Union speech this afternoon. 

The US President is expected to focus on hot-button issues like the flow of migrants across the Mexico-US border. 

He's expected to lash Republicans for pulling out of a border reform plan that they helped draft, after Donald Trump said he wanted to keep the border as a hot election issue. 

 US Correspondent Richard Arnold told Mike Hosking that we can expect some fireworks. 

He said that in the past the opposition would remain seated while supporters show their enthusiasm, but lately it’s been getting more and more raucous. 

Biden is due to speak about 3pm New Zealand time. 

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