After a delay game that looked like it would never end, former Vice President Joe Biden is expected to officially launch his 2020 presidential run Thursday with an online video.

That brings the number of Democratic can­didates to at least 20, and means all the real contenders are now off and running.

Yes, there may be one or two more hats ready to be tossed into the ring — but no one who needs be taken very seriously.

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In making his third try for the presidency, Biden immediately moves to the head of the pack, alongside his fellow septuagenarian, Sen. Bernie Sanders.

Question is, which Joe Biden is running?

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