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had the House and Senate...to the enduring thanks of Americans even in Red states...then along came Mitch McConnell's vow to make Obama a "One Term President"...didn't work, but here's an AI summary of Mitch's efforts..which included filibustering virtually every piece of legislation that Obama put forward...including Immigration/Border Security Reform.

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AI Overview

Then-Senate Minority Leader Mitch McConnell (R-Ky.) made a statement in 2010 that his top political priority was to prevent President Barack Obama's re-election.

While McConnell did not succeed in making Obama a one-term president, he was successful in slowing the Obama administration's legislative agenda, particularly after the Republican Party regained control of the House of Representatives in 2010 and the Senate in 2014.

Reports indicate that McConnell and the Republicans used a variety of tactics to block Obama's agenda and appointments, including:
Blocking votes on Supreme Court nominees such as Merrick Garland.
Employing filibusters on numerous pieces of legislation.
Attaching riders to spending bills to limit Obama's policies, especially on areas like the environment, healthcare, and regulations from the Environmental Protection Agency.
Using budget tactics to circumvent Democratic filibusters.

The Republican strategy of obstructionism during the Obama years is viewed by some as having contributed to a dysfunctional and paralyzed Senate, and may have helped the Republican Party gain control of the government, according to a Politico Magazine article published in December 2016.
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Now you know why Obama was unable to pass Immigration Reform...btw, I'll remind you if you somehow forget ;-)