What did Donald Trump do today?

He told an obvious lie, assuming he actually writes his tweets or reads them.

Today,  in reference to a pair of immigration bills authored by conservative Republican Rep. Bob Goodlatte, Trump tweeted this:

I never pushed the Republicans in the House to vote for the Immigration Bill, either GOODLATTE 1 or 2, because it could never have gotten enough Democrats as long as there is the 60 vote threshold. I released many prior to the vote knowing we need more Republicans to win in Nov.

— Donald J. Trump (@realDonaldTrump) June 30, 2018

Wednesday, Trump tweeted this:

HOUSE REPUBLICANS SHOULD PASS THE STRONG BUT FAIR IMMIGRATION BILL, KNOWN AS GOODLATTE II, IN THEIR AFTERNOON VOTE TODAY, EVEN THOUGH THE DEMS WON’T LET IT PASS IN THE SENATE. PASSAGE WILL SHOW THAT WE WANT STRONG BORDERS & SECURITY WHILE THE DEMS WANT OPEN BORDERS = CRIME. WIN!

— Donald J. Trump (@realDonaldTrump) June 27, 2018

Both bills failed to pass in the Republican-controlled House this week.

The most obvious explanation--that Trump cut and ran from what amounts to his own immigration plan amid plummeting poll numbers and nationwide resistance--is plausible. But Trump's history suggests at least two alternatives: that Trump simply forgot what his position on the bill was, or that Trump's earlier tweet was written by his staff and he was never informed of his "position."

Why should I care about this?

• A president who can't remember what his positions are from day to day is probably unfit for office.

• A president who doesn't care what his positions are from day to day is definitely unfit for office.