In a four-way race, Trump has pulled to within two points of Hillary according to the Muhlenberg College poll (Morning Call), a well-respected poll. Trump receives 38 percent to Hillary's 40 percent.

In this poll, Trump has closed the gap by six points since the last measure. He has achieved this by increasing his support, not by reducing hers.

This is probably a reflection of Donald Trump spending money in Pennsylvania on advertising. He has not been spending money there long, while Hillary has been spending a large amount focused on attacks on Trump.

If this is the main reason, one can expect this tightening to hold because the Trump team announced Friday that they would be spending heavily the rest of the way.

The poll shows Donald Trump gaining supporters and Hillary holding hers.

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